The prefix 'Ms-' should be 'MS-'

Clang is otherwise consistent that Microsoft be abbreviated as MS, not
Ms.

llvm-svn: 227842
diff --git a/clang/lib/CodeGen/CGClass.cpp b/clang/lib/CodeGen/CGClass.cpp
index 459b774..2e2b420 100644
--- a/clang/lib/CodeGen/CGClass.cpp
+++ b/clang/lib/CodeGen/CGClass.cpp
@@ -1954,7 +1954,7 @@
   // Don't initialize the vtable pointer if the class is marked with the
   // 'novtable' attribute.
   if ((RD == VTableClass || RD == NearestVBase) &&
-      VTableClass->hasAttr<MsNoVTableAttr>())
+      VTableClass->hasAttr<MSNoVTableAttr>())
     return;
 
   // Compute the address point.