Add tests for rsa_utility.c

BUG=chromium-os:17564
TEST=make && make runtests

Change-Id: Ia86241f5407ba53d93d3862b29c61b510e560e92
Reviewed-on: http://gerrit.chromium.org/gerrit/6959
Reviewed-by: Bill Richardson <wfrichar@chromium.org>
Tested-by: Randall Spangler <rspangler@chromium.org>
6 files changed