Disable BCJ filters.

It's just a coincidence that we happened to wonder about these just
before the recent https://en.wikipedia.org/wiki/XZ_Utils_backdoor
incident, and the results came in just after!

Extra code we don't need, and extra runtime that doesn't win us any
size benefits --- it would be embarrassing to feel compelled to do
the riscv64 work for "feature parity" with a useless feature...

Bug: http://b/329112384
Change-Id: If258d57ab8a860ede52eb124e04434ba647734aa
1 file changed