key_increment_test: warn if atypical gbb flags are encountered.

BUG=b:70392534
TEST=excercised (up to the generating payloads phase) via "./keyinc_setup.sh
~/key_inc.conf ALL" with a key_inc.conf specifiying a binary with 0x39
flags and one with 0x4239 flags and observed the anticipated log messages.

Change-Id: Icbb8d08b779e71623cfebd00e7133c7874b40e08
Reviewed-on: https://chromium-review.googlesource.com/848212
Commit-Ready: ChromeOS CL Exonerator Bot <chromiumos-cl-exonerator@appspot.gserviceaccount.com>
Tested-by: Kevin Shelton <kmshelton@chromium.org>
Reviewed-by: Shelley Chen <shchen@chromium.org>
1 file changed