Bug 1192125 - Specifiy the test_packages for emulator x86 build. r=garndt

testing/taskcluster/tasks/builds/b2g_emulator_x86_base.yml

@@ -26,6 +26,7 @@ task:
     # files are located.
     locations:
       build: 'public/build/emulator.tar.gz'
+      test_packages: 'public/build/test_packages.json'
       tests: 'public/build/b2g-tests.zip'
       symbols: 'public/build/b2g-crashreporter-symbols.zip'
       sources: 'public/build/sources.xml'