Bug 1294878 - Add tooltool manifest for Android 6.0 AVD; r=me

testing/config/tooltool-manifests/androidarm_6_0/releng.manifest

@@ -0,0 +1,7 @@
+[{
+"size": 276089293,
+"digest": "a5aca63869d9ca9770b2f760923e65c08a36e4235f4bf9c422c9fd005c78b24bd7d8c74e9b8d11a4606d1d7081bd7181866f1ec50d1d87ad8de93521090d2d36",
+"algorithm": "sha512",
+"filename": "AVDs-armv7a-android-6.0-build-2016-08-12.tar.gz",
+"unpack": true
+}]