Merge pull request #4847 from depristo/master

Remove write-strings warning from COPTs

BUILD

@@ -43,12 +43,12 @@ COPTS = select({
     "//conditions:default": [
         "-DHAVE_PTHREAD",
         "-Wall",
-        "-Wwrite-strings",
         "-Woverloaded-virtual",
         "-Wno-sign-compare",
         "-Wno-unused-function",
         # Prevents ISO C++ const string assignment warnings for pyext sources.
         "-Wno-writable-strings",
+        "-Wno-write-strings",
     ],
 })