Subzero doesn't actually use any ABI breaking LLVM functionality, so
we compile a minimized version of LLVMSupport which does not include
the symbol used to detect a mismatch in the ABI-breaking check at link-
time. Hence we need to disable this check.

Change-Id: I04c37deb359b81c21954ad92a6665d44fe2312a5
Reviewed-on: https://swiftshader-review.googlesource.com/8929Tested-by: Nicolas Capens <capn@google.com>
Reviewed-by: Alexis Hétu <sugoi@google.com>
Reviewed-by: Nicolas Capens <capn@google.com>