Revert "disable Krait for Mac builds to avoid assembler issues"

This doesn't seem to be a problem any more, and mac builds
that differ from linux builds is causing other problems.

This reverts commit 7c40fb95dc90ed092f435c769b4bbb494d453674.

Bug: 24339250
Change-Id: I8a0da11df42d58ba9c3ded4571f1db870f400a21
1 file changed