trim #include <new> from SkPostConfig.h

Change-Id: I693ddcd4ade101ba4eb4102e03adce183aa1d672
Reviewed-on: https://skia-review.googlesource.com/133829
Reviewed-by: Mike Klein <mtklein@chromium.org>
Commit-Queue: Mike Klein <mtklein@chromium.org>
diff --git a/src/core/SkString.cpp b/src/core/SkString.cpp
index 707e8be..a6d9335 100644
--- a/src/core/SkString.cpp
+++ b/src/core/SkString.cpp
@@ -5,12 +5,13 @@
  * found in the LICENSE file.
  */
 
-#include "SkString.h"
-#include <stdarg.h>
-#include <cstdio>
 #include "SkAtomics.h"
 #include "SkSafeMath.h"
+#include "SkString.h"
 #include "SkUtils.h"
+#include <cstdio>
+#include <new>
+#include <stdarg.h>
 
 // number of bytes (on the stack) to receive the printf result
 static const size_t kBufferSize = 1024;