Override the user's language settings during tests

test/lib/TestGyp.py

Index: test/lib/TestGyp.py
diff --git a/test/lib/TestGyp.py b/test/lib/TestGyp.py
index cde04cac19bf7fa45fc8205249349038cbf6aa52..119417d1c2b0c18197f3131723468fb301758382 100644
--- a/test/lib/TestGyp.py
+++ b/test/lib/TestGyp.py
@@ -151,6 +151,9 @@ class TestGypBase(TestCommon.TestCommon):
     # Clear $GYP_DEFINES for the same reason.
     if 'GYP_DEFINES' in os.environ:
       del os.environ['GYP_DEFINES']
+    # Override the user's language settings, which could
+    # otherwise make the output vary from what is expected.
+    os.environ['LC_ALL'] = 'C'
 
   def built_file_must_exist(self, name, type=None, **kw):
     """