make: adjust for new vendor/lzma-sdk location

src/stub/scripts/check_whitespace.sh

@@ -11,6 +11,7 @@ find . \
     -type d -name '.hg' -prune -o \
     -type d -name 'build*' -prune -o \
     -type d -name 'tmp*' -prune -o \
+    -type d -name 'vendor' -prune -o \
     -type f -iname '*.bat' -prune -o \
     -type f -iname '*.exe' -prune -o \
     -type f -iname '*.o' -prune -o \

src/stub/scripts/check_whitespace_git.sh

@@ -10,6 +10,7 @@ set -e; set -o pipefail
 git ls-files --full-name -z | perl -0 -n -e '
     s,^,./,;
     if (m,^\./src/lzma-sdk(\0|$),) { }
+    if (m,^\./vendor/,) { }
     elsif (m,\.bat(\0|$),) { }
     elsif (m,\.exe(\0|$),) { }
     else { print; }