create_new_gsc_key.sh: generate key file with the requested base name

Let's require the user of this script to explicitly provide the base
file name of the generated key.

BRANCH=none
BUG=b:221423468
TEST=verified generating the new key in various directories (local and
     non local).

     Verified that the script fails if the user does not supply the
     required key file base name.

Change-Id: Iaf85e5822d06c65ca4b7d51f17579269576e4707
Signed-off-by: Vadim Bendebury <vbendeb@google.com>
Reviewed-on: https://chromium-review.googlesource.com/c/chromiumos/platform/vboot_reference/+/3630287
Tested-by: Vadim Bendebury <vbendeb@chromium.org>
Reviewed-by: Mike Frysinger <vapier@chromium.org>
Commit-Queue: Vadim Bendebury <vbendeb@chromium.org>
1 file changed