Move ObjC decls to DeclObjC.h, a new AST header.
Update clients and add to project file.



git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@42494 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/Sema/SemaType.cpp b/Sema/SemaType.cpp
index 5340928..1b61faa 100644
--- a/Sema/SemaType.cpp
+++ b/Sema/SemaType.cpp
@@ -14,6 +14,7 @@
 #include "Sema.h"
 #include "clang/AST/ASTContext.h"
 #include "clang/AST/Decl.h"
+#include "clang/AST/DeclObjC.h"
 #include "clang/Parse/DeclSpec.h"
 #include "clang/Lex/IdentifierTable.h"
 #include "clang/Basic/LangOptions.h"