clean up a bunch of fixme's I added, by moving 
DirectoryLookup::DirType into SourceManager.h


git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@56692 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/lib/Lex/Pragma.cpp b/lib/Lex/Pragma.cpp
index e6955d7..b6f5ac4 100644
--- a/lib/Lex/Pragma.cpp
+++ b/lib/Lex/Pragma.cpp
@@ -239,8 +239,7 @@
   // Notify the client, if desired, that we are in a new source file.
   if (Callbacks)
     Callbacks->FileChanged(TheLexer->getSourceLocation(TheLexer->BufferPtr),
-                           PPCallbacks::SystemHeaderPragma,
-                           DirectoryLookup::SystemHeaderDir);
+                           PPCallbacks::SystemHeaderPragma, SrcMgr::C_System);
 }
 
 /// HandlePragmaDependency - Handle #pragma GCC dependency "foo" blah.