r215557 - Header guard canonicalization, clang part.

[Rafael Espíndola]

It looks like there were some unintended changes in here. I fixed one
in r215561.

index 0ef740c..985c72b 100644
--- a/lib/Driver/Tools.cpp
+++ b/lib/Driver/Tools.cpp
@@ -5379,7 +5379,7 @@ bool mips::hasMipsAbiArg(const ArgList &Args,
const char *Value) {

 bool mips::isUCLibc(const ArgList &Args) {
   Arg *A = Args.getLastArg(options::OPT_m_libc_Group);
-  return A && A->getOption().matches(options::OPT_nolibc);
+  return A && A->getOption().matches(options::OPT_muclibc);
 }

 bool mips::isNaN2008(const ArgList &Args, const llvm::Triple &Triple) {