Bug 1151370 - Only guess platform/buildtype in mozinfo.py if processor is known, r=ted

--HG--
extra : rebase_source : 3cbb0cb504bf17d91936e2b995dac6c8d9f8badc

python/mozbuild/mozbuild/mozinfo.py

@@ -129,7 +129,9 @@ def build_dict(config, env=os.environ):
             return 'asan'
         return 'opt'
 
-    if 'buildapp' in d:
+    # if buildapp or bits are unknown, we don't have a configuration similar to
+    # any in automation and the guesses are useless.
+    if 'buildapp' in d and 'bits' in d:
         d['platform_guess'] = guess_platform()
         d['buildtype_guess'] = guess_buildtype()