Revert "[ARM] push LR before __gnu_mcount_nc"

This reverts commit f4cf3b959333f62b7a7b2d7771f7010c9d8da388.

llvm-svn: 369149
diff --git a/clang/lib/Basic/Targets/ARM.cpp b/clang/lib/Basic/Targets/ARM.cpp
index b234f01..3ae2091 100644
--- a/clang/lib/Basic/Targets/ARM.cpp
+++ b/clang/lib/Basic/Targets/ARM.cpp
@@ -322,7 +322,7 @@
   if (Triple.getOS() == llvm::Triple::Linux ||
       Triple.getOS() == llvm::Triple::UnknownOS)
     this->MCountName = Opts.EABIVersion == llvm::EABI::GNU
-                           ? "llvm.arm.gnu.eabi.mcount"
+                           ? "\01__gnu_mcount_nc"
                            : "\01mcount";
 
   SoftFloatABI = llvm::is_contained(Opts.FeaturesAsWritten, "+soft-float-abi");