Bug 966311 - Calculate frame size for stereo wave. r=doublec, a=1.2.x+

We were assuming 8-bit WAVE files were mono-only, but this is
not necessarily the case.
Bug 957621 - Disable test_bug570378-* on b2g desktop for frequent failures which kill the run. a=test-only
Bug 850721 - Fix social blocklist oranges by not enabling the default update server. r=mixedpuppy, a=test-only