Match only make in gyp_chromium excludes.

The current test also matches the CMake generator.

R=thakis@chromium.org

Review URL: https://codereview.chromium.org/235943009

git-svn-id: http://src.chromium.org/svn/trunk/src/build@263984 4ff67af0-8c30-449e-8e8b-ad334ec8d88c

gyp_chromium

@@ -10,6 +10,7 @@
 import glob
 import gyp_helper
 import os
+import re
 import shlex
 import subprocess
 import string
@@ -248,7 +249,7 @@ if __name__ == '__main__':
 
   # We explicitly don't support the make gyp generator (crbug.com/348686). Be
   # nice and fail here, rather than choking in gyp.
-  if 'make' in os.environ.get('GYP_GENERATORS', ''):
+  if re.search(r'(^|,|\s)make($|,|\s)', os.environ.get('GYP_GENERATORS', '')):
     print 'Error: make gyp generator not supported (check GYP_GENERATORS).'
     sys.exit(1)