default.bmpblk --> bmpblk.bin

This renames the bmpblk file so that it corresponds to what
chromeos-bmpblk installs.

BUG=none
TEST=cros_bundle_firmware no longer complains about missing bmpblk
after re-emerging chroemos-bmpblk

Change-Id: I28ed3a65f95d93bc550de3f9ae7af938f6daf18d
Reviewed-on: https://gerrit.chromium.org/gerrit/31025
Reviewed-by: Hung-Te Lin <hungte@chromium.org>
Commit-Ready: David Hendricks <dhendrix@chromium.org>
Tested-by: David Hendricks <dhendrix@chromium.org>
1 file changed