Merge branch 'jreiser' into devel

O_BINFO simplifies stubs on linux Elf;
PowerPC64 (big endian: Apple Macintosh G5) and PowerPC* cleanup;
-fpie simplification; shlib for arm64, amd64.

A big merge due to suspending activity on 'devel' branch
during stabilization for release of UPX-3.94.
There were intermediate merges with private branch 'jreiser',
and attempted rebase onto 'devel' did not go well.
Verfication of cases ({ET_EXEC, -fpie, shlib} x {$ARCH}) is in progress.

	modified:   ../.github/travis_testsuite_1.sh
	modified:   conf.h
	modified:   linker.cpp
	modified:   linker.h
	modified:   p_lx_elf.cpp
	modified:   p_lx_elf.h
	modified:   p_mach.cpp
	modified:   p_mach.h
	modified:   p_mach_enum.h
	modified:   packmast.cpp
	modified:   stub/Makefile
	modified:   stub/scripts/xstrip.py

	modified:   stub/src/amd64-darwin.dylib-entry.S
	modified:   stub/src/amd64-darwin.macho-entry.S
	modified:   stub/src/amd64-linux.elf-entry.S
	modified:   stub/src/amd64-linux.elf-fold.S
	modified:   stub/src/amd64-linux.elf-main.c
	modified:   stub/src/arch/powerpc/32/bxx.S
	modified:   stub/src/arch/powerpc/32/lzma_d.S
	modified:   stub/src/arch/powerpc/32/nrv2b_d.S
	modified:   stub/src/arch/powerpc/32/nrv2d_d.S
	modified:   stub/src/arch/powerpc/32/nrv2e_d.S
	modified:   stub/src/arch/powerpc/32/ppc_regs.h
	new file:   stub/src/arch/powerpc/64/Makefile
	new file:   stub/src/arch/powerpc/64/Makefile.extra
	new file:   stub/src/arch/powerpc/64/bxx.S
	new file:   stub/src/arch/powerpc/64/lzma_d.S
	new file:   stub/src/arch/powerpc/64/lzma_d_cf.S
	new file:   stub/src/arch/powerpc/64/lzma_d_cs.S
	new file:   stub/src/arch/powerpc/64/macros.S
	new file:   stub/src/arch/powerpc/64/nrv2b_d.S
	new file:   stub/src/arch/powerpc/64/nrv2d_d.S
	new file:   stub/src/arch/powerpc/64/nrv2e_d.S
	new file:   stub/src/arch/powerpc/64/ppc_regs.h
	modified:   stub/src/arch/powerpc/64le/bxx.S
	copied:     stub/src/arch/powerpc/64le/lzma_d.S -> stub/src/arch/powerpc/64le/lzma_d-common.S
	modified:   stub/src/arch/powerpc/64le/lzma_d.S
	modified:   stub/src/arch/powerpc/64le/lzma_d_cs.S
	modified:   stub/src/arch/powerpc/64le/nrv2b_d.S
	modified:   stub/src/arch/powerpc/64le/nrv2d_d.S
	modified:   stub/src/arch/powerpc/64le/nrv2e_d.S
	modified:   stub/src/arch/powerpc/64le/ppc_regs.h
	modified:   stub/src/arm.v4a-linux.elf-entry.S
	modified:   stub/src/arm.v4a-linux.elf-fold.S
	modified:   stub/src/arm64-darwin.macho-entry.S
	modified:   stub/src/arm64-linux.elf-entry.S
	modified:   stub/src/arm64-linux.elf-fold.S
	modified:   stub/src/arm64-linux.shlib-init.S
	modified:   stub/src/i386-bsd.elf-entry.S
	modified:   stub/src/i386-darwin.macho-entry.S
	modified:   stub/src/i386-linux.elf-entry.S
	modified:   stub/src/i386-linux.elf-fold.S
	modified:   stub/src/mipsel.r3000-linux.elf-entry.S
	modified:   stub/src/mipsel.r3000-linux.elf-fold.S
	modified:   stub/src/powerpc-darwin.dylib-entry.S
	modified:   stub/src/powerpc-darwin.macho-entry.S
	modified:   stub/src/powerpc-darwin.macho-fold.S
	modified:   stub/src/powerpc-linux.elf-entry.S
	modified:   stub/src/powerpc-linux.elf-fold.S
	modified:   stub/src/powerpc-linux.elf-main.c
	new file:   stub/src/powerpc64-darwin.dylib-entry.S
	new file:   stub/src/powerpc64-darwin.macho-entry.S
	new file:   stub/src/powerpc64-darwin.macho-fold.S
	new file:   stub/src/powerpc64-darwin.macho-main.c
	new file:   stub/src/powerpc64-linux.elf-entry.S
	new file:   stub/src/powerpc64-linux.elf-fold.S
	new file:   stub/src/powerpc64-linux.elf-fold.lds
	new file:   stub/src/powerpc64-linux.elf-main.c
	modified:   stub/src/powerpc64-savegpr0.S
	modified:   stub/src/powerpc64le-darwin.dylib-entry.S
	modified:   stub/src/powerpc64le-darwin.macho-entry.S
	modified:   stub/src/powerpc64le-darwin.macho-fold.S
	modified:   stub/src/powerpc64le-linux.elf-entry.S
	modified:   stub/src/powerpc64le-linux.elf-fold.S
	modified:   stub/src/powerpc64le-linux.elf-main.c

	and most stub/*.h and stub/tmp/*.dump

src/stub/tmp/mips.r3000-linux.elf-entry.bin.dump

@@ -14,7 +14,7 @@ Idx Name          Size      VMA       LMA       File off  Algn  Flags
   9 NRV_TAIL      00000010  00000000  00000000  00001a74  2**0  CONTENTS, READONLY
  10 CFLUSH        00000024  00000000  00000000  00001a84  2**0  CONTENTS, READONLY
  11 ELFMAINY      0000002a  00000000  00000000  00001aa8  2**0  CONTENTS, RELOC, READONLY
- 12 ELFMAINZ      000000d0  00000000  00000000  00001ad2  2**0  CONTENTS, READONLY
+ 12 ELFMAINZ      000000d4  00000000  00000000  00001ad2  2**0  CONTENTS, RELOC, READONLY
 SYMBOL TABLE:
 00000000 l    d  NRV_TAIL	00000000 NRV_TAIL
 00000000 l    d  ELFMAINZ	00000000 ELFMAINZ
@@ -36,6 +36,7 @@ SYMBOL TABLE:
 00000000         *UND*	00000000 LENU
 00000000         *UND*	00000000 ADRX
 00000018 g     O ELFMAINX	00000000 _start
+00000000         *UND*	00000000 O_BINFO
 
 RELOCATION RECORDS FOR [ELFMAINX]:
 OFFSET   TYPE              VALUE
@@ -62,3 +63,7 @@ OFFSET   TYPE              VALUE
 RELOCATION RECORDS FOR [ELFMAINY]:
 OFFSET   TYPE              VALUE
 00000004 R_MIPS_PC16       ELFMAINZ
+
+RELOCATION RECORDS FOR [ELFMAINZ]:
+OFFSET   TYPE              VALUE
+000000d0 R_MIPS_32         O_BINFO