cbuildbot: Change firmware_from_source file name pattern to include *image*.bin

legacy_image.bin may change file name to "nv_image.bin", so let's change the
selection pattern to "*image*.bin".

BUG=chrome-os-partner:10025
TEST=trybot
     http://chromegw/p/tryserver.chromiumos/builders/link-release/builds/58

Change-Id: I40e308ee520014089ae601621bc845b5405e2269
Reviewed-on: https://gerrit.chromium.org/gerrit/25600
Tested-by: Hung-Te Lin <hungte@chromium.org>
Reviewed-by: David James <davidjames@chromium.org>
Commit-Ready: Hung-Te Lin <hungte@chromium.org>
1 file changed