[PATCH] GCC compatibility: pass -z linker options to the linker

[Sylvestre Ledru]

I haven't seen the -R argument used. Do you have some pointers on this?
We have at least 6 cases in Debian of this usage (http://clang.debian.net/status.php?version=3.4.2&key=UNKNOWN_ARG)
To improve the compatibility with gcc, I think that make sense.

http://reviews.llvm.org/D4393