MC: Clean up method names in MCContext.

The naming was a mish-mash of old and new style. Update to be consistent
with the new. NFC.

llvm-svn: 237594
diff --git a/llvm/lib/Target/TargetMachine.cpp b/llvm/lib/Target/TargetMachine.cpp
index 5039672..0523f04 100644
--- a/llvm/lib/Target/TargetMachine.cpp
+++ b/llvm/lib/Target/TargetMachine.cpp
@@ -189,5 +189,5 @@
   SmallString<60> NameStr;
   getNameWithPrefix(NameStr, GV, Mang);
   const TargetLoweringObjectFile *TLOF = getObjFileLowering();
-  return TLOF->getContext().GetOrCreateSymbol(NameStr);
+  return TLOF->getContext().getOrCreateSymbol(NameStr);
 }