Disable bitmask-based loop filter code
Disable bitmask-based loop filter code

This code has a bug which can cause segfaults when decoding a stream
which uses variable-size frames. Fall back to the old code path
until this is fixed.

BUG=aomedia:1906

Change-Id: I13fc3af93f21191f455c1e7c1bcb3993419fd26c

GrokImageCompression/aom,GrokImageCompression/aom,GrokImageCompression/aom,GrokImageCompression/aom,GrokImageCompression/aom,GrokImageCompression/aom