force --std=gnu89 for clang (and gcc), properly
force --std=gnu89 for clang (and gcc), properly

This implements 3a4860a751980b566b44d57cde188292df5e8726 in the proper place.

Change-Id: I7b60602933819561d0bff5e72dcd5ee8986f63c0

JurassicWordExcel/core,JurassicWordExcel/core,JurassicWordExcel/core,JurassicWordExcel/core,JurassicWordExcel/core,JurassicWordExcel/core,JurassicWordExcel/core,JurassicWordExcel/core,JurassicWordExcel/core,JurassicWordExcel/core