Sink a #include while we're here. NFC.

Format.h doesn't use stack.

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@220879 91177308-0d34-0410-b5e6-96231b3b80d8

include/clang/Format/Format.h

@@ -18,7 +18,6 @@
 #include "clang/Basic/LangOptions.h"
 #include "clang/Tooling/Core/Replacement.h"
 #include "llvm/ADT/ArrayRef.h"
-#include <stack>
 #include <system_error>
 
 namespace clang {

lib/Format/UnwrappedLineParser.h

@@ -20,6 +20,7 @@
 #include "clang/Basic/IdentifierTable.h"
 #include "clang/Format/Format.h"
 #include <list>
+#include <stack>
 
 namespace clang {
 namespace format {