More #include cleaning
 - Drop Diagnostic.h from DeclSpec.h, move utility Diag methods into
   implementation .cpp


git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@54626 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/lib/Parse/ParseDecl.cpp b/lib/Parse/ParseDecl.cpp
index 5b4473e..e5c8fe7 100644
--- a/lib/Parse/ParseDecl.cpp
+++ b/lib/Parse/ParseDecl.cpp
@@ -12,6 +12,7 @@
 //===----------------------------------------------------------------------===//
 
 #include "clang/Parse/Parser.h"
+#include "clang/Basic/Diagnostic.h"
 #include "clang/Parse/DeclSpec.h"
 #include "clang/Parse/Scope.h"
 #include "llvm/ADT/SmallSet.h"