ninja: fix KEYWORDS field.

I didn't use cros_portage_upgrade last time so missed this bit.

BUG=1132813
TEST=precq passes

Change-Id: I19f3c54819cecc91aee5f828c024f70d98a223ca
Reviewed-on: https://chromium-review.googlesource.com/c/chromiumos/overlays/portage-stable/+/2461807
Commit-Queue: Michael Pishchagin <mblsha@google.com>
Commit-Queue: Chris McDonald <cjmcdonald@chromium.org>
Auto-Submit: Michael Pishchagin <mblsha@google.com>
Reviewed-by: Chris McDonald <cjmcdonald@chromium.org>
Tested-by: Chris McDonald <cjmcdonald@chromium.org>
2 files changed