keygeneration: fix some portability aspects

The "function" keyword is not portable -- use the normal function style.

The awk command uses a non-portable regex (the word anchor \>).  Rework
it to avoid regexes entirely.

BUG=chromium:475101
TEST=keyset_version_check.sh works on a POSIX system
BRANCH=None

Change-Id: I5446f63aa9181d06da1898aafb8fab17f5042989
Reviewed-on: https://chromium-review.googlesource.com/296562
Commit-Ready: Mike Frysinger <vapier@chromium.org>
Tested-by: Mike Frysinger <vapier@chromium.org>
Reviewed-by: David Riley <davidriley@chromium.org>
1 file changed