remove -k 0 from builds

We added this a while ago while debugging some many-files-failing
build failures, but keeping -k 0 now just makes single failures
harder to find in the log.  Now the first failure will stop the
build and be at the bottom of the log.

Change-Id: I1ed2825f2c64702a228903067230356f09b90046
Reviewed-on: https://skia-review.googlesource.com/152589
Commit-Queue: Mike Klein <mtklein@google.com>
Commit-Queue: Ben Wagner <benjaminwagner@google.com>
Auto-Submit: Mike Klein <mtklein@google.com>
Reviewed-by: Ben Wagner <benjaminwagner@google.com>
41 files changed