Bug 1311991 - Add CRAMTEST_MANIFEST moz.build variable, r=gps

Supports CRAMTEST_MANIFEST manifestparser manifests in moz.build. Add a new
manifest like:

CRAMTEST_MANIFEST += [
    'path/to/cram.ini',
]

MozReview-Commit-ID: 1eagYMnCrnz

--HG--
extra : rebase_source : 15302e188196fc39221f4179d96f23ba21408b88

python/mozbuild/mozbuild/frontend/context.py

@@ -1584,6 +1584,10 @@ VARIABLES = {
         """List of manifest files defining python unit tests.
         """),
 
+    'CRAMTEST_MANIFESTS': (ManifestparserManifestList, list,
+        """List of manifest files defining cram unit tests.
+        """),
+
 
     # The following variables are used to control the target of installed files.
     'XPI_NAME': (unicode, unicode,

python/mozbuild/mozbuild/testing.py

@@ -297,6 +297,7 @@ TEST_MANIFESTS = dict(
     FIREFOX_UI_UPDATE=('firefox-ui-update', 'firefox-ui', '.', False),
     PUPPETEER_FIREFOX=('firefox-ui-functional', 'firefox-ui', '.', False),
     PYTHON_UNITTEST=('python', 'python', '.', False),
+    CRAMTEST=('cram', 'cram', '.', False),
 
     # marionette tests are run from the srcdir
     # TODO(ato): make packaging work as for other test suites