Add comments back that were accidentally removed in r170933.

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@170938 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/lib/Sema/DeclSpec.cpp b/lib/Sema/DeclSpec.cpp
index 112fabd..70d0120 100644
--- a/lib/Sema/DeclSpec.cpp
+++ b/lib/Sema/DeclSpec.cpp
@@ -714,12 +714,14 @@
 }
 
 bool DeclSpec::setFunctionSpecInline(SourceLocation Loc) {
+  // 'inline inline' is ok.
   FS_inline_specified = true;
   FS_inlineLoc = Loc;
   return false;
 }
 
 bool DeclSpec::setFunctionSpecVirtual(SourceLocation Loc) {
+  // 'virtual virtual' is ok.
   FS_virtual_specified = true;
   FS_virtualLoc = Loc;
   return false;