fix make output checks under C locale

Current versions of make use a simpler quoting style in the C locale.
Update the expected output to match.

Bug: 926296
Change-Id: I53b55a423808e5cd3b35e2a8ee404e78f8bde28d
Reviewed-on: https://chromium-review.googlesource.com/c/external/gyp/+/1697942


Reviewed-by: Dirk Pranke <dpranke@chromium.org>

test/lib/TestGyp.py

@@ -573,7 +573,7 @@ class TestGypMake(TestGypBase):
       message_target = 'all'
     else:
       message_target = target
-    kw['stdout'] = "make: Nothing to be done for `%s'.\n" % message_target
+    kw['stdout'] = "make: Nothing to be done for '%s'.\n" % message_target
     return self.build(gyp_file, target, **kw)
   def run_built_executable(self, name, *args, **kw):
     """
@@ -1067,7 +1067,7 @@ class TestGypXcode(TestGypBase):
                             "PhaseScriptExecution /\\S+/Script-[0-9A-F]+\\.sh\n"
                             "    cd /\\S+\n"
                             "    /bin/sh -c /\\S+/Script-[0-9A-F]+\\.sh\n"
-                            "(make: Nothing to be done for `all'\\.\n)?")
+                            "(make: Nothing to be done for .all.\\.\n)?")
 
   strip_up_to_date_expressions = [
     # Various actions or rules can run even when the overall build target