Convert CHECK(false) to LOG(FATAL) in ash

Otherwise the log string isn't captured in the logs.

Bug: none
Change-Id: Iaec642686a29cce13a54b35186e7fd8aafd82854
Reviewed-on: https://chromium-review.googlesource.com/c/1464937
Commit-Queue: James Cook <jamescook@chromium.org>
Commit-Queue: Xiyuan Xia <xiyuan@chromium.org>
Auto-Submit: James Cook <jamescook@chromium.org>
Reviewed-by: Xiyuan Xia <xiyuan@chromium.org>
Cr-Commit-Position: refs/heads/master@{#630960}
2 files changed