BaseTools: Fix BinWrappers LzmaF86Compress Script

LzmaF86Compress Script should use $arg to arg value.

Contributed-under: TianoCore Contribution Agreement 1.0
Signed-off-by: Liming Gao <liming.gao@intel.com>
Reviewed-by: Laszlo Ersek <lersek@redhat.com>

git-svn-id: https://svn.code.sf.net/p/edk2/code/trunk/edk2@17909 6f19259b-4bc3-4df7-8a09-765794883524

BaseTools/BinWrappers/PosixLike/LzmaF86Compress

@@ -13,7 +13,7 @@
 #
 
 for arg in $*; do
-  if [ "arg" = "-e" -o "arg" = "-d" ]; then
+  if [ "$arg" = "-e" -o "$arg" = "-d" ]; then
     FLAG=--f86
     break;
   fi