Add TestGypXcodeNinja to run tests against the xcode-ninja generator

test/copies/gyptest-updir.py

Index: test/copies/gyptest-updir.py
diff --git a/test/copies/gyptest-updir.py b/test/copies/gyptest-updir.py
index 00b01c720ae817139350ec1520be38efd04d82b7..6b9e8e63d0f2bec05457a7fc107f678bbfec44e3 100755
--- a/test/copies/gyptest-updir.py
+++ b/test/copies/gyptest-updir.py
@@ -13,7 +13,10 @@ import TestGyp
 
 # The Android build system doesn't allow output to go to arbitrary places.
 test = TestGyp.TestGyp(formats=['!android'])
-test.run_gyp('copies-updir.gyp', chdir='src')
+test.run_gyp('copies-updir.gyp',
+             '-G', 'xcode_ninja_target_pattern=^copies_up$',
+             chdir='src')
+
 test.relocate('src', 'relocate/src')
 test.build('copies-updir.gyp', 'copies_up', chdir='relocate/src')