put overlay into PT_LOAD, in order to protect from /usr/bin/strip,

and prepare to discontinue use of /proc/exe by stub
	p_unix.cpp p_unix.h stub/Makefile
	stub/l_lx_exec86.lds

committer: jreiser <jreiser> 958837765 +0000

src/stub/l_lx_exec86.lds

@@ -0,0 +1,17 @@
+OUTPUT_FORMAT("elf32-i386", "elf32-i386", "elf32-i386")
+OUTPUT_ARCH(i386)
+ENTRY(_start)
+SECTIONS
+{
+  /*  0x08048000: customary Linux/x86 Elf .text start */
+  . = 0x08048000 + SIZEOF_HEADERS;
+  . = ALIGN(0x80);  /* room for Ehdr, 2*Phdr, l_info */
+  .data : { /* put everything together in one Phdr */
+    *(.text)
+    *(.rodata)
+    *(.data)
+    *(.bss)
+    *(COMMON)
+  }
+  /* save other Phdr for the overlay */
+}