Teach the include sorting script about the gtest headers; sort them with

the system headers.

llvm-svn: 169242

llvm/utils/sort_includes.py

@@ -35,7 +35,7 @@ def sort_includes(f):
         api_headers.append(header)
         look_for_api_header = False
         continue
-      if header.startswith('<'):
+      if header.startswith('<') or header.startswith('"gtest/'):
         system_headers.append(header)
         continue
       if (header.startswith('"llvm/') or header.startswith('"llvm-c/') or