Log Message:
cliqz: Fixed build failures.

1. Added a missing build dependency, devel/yasm.

2. Fixed build failures when compiling with rust>=1.33 by disabling the
--enable-rust-simd flag for now. (borrowed from ryoon@'s fix from
www/firefox)

3. Bumped the rust dependency minimum version to 1.31.

4. Bump PKGREVISION