vbutil_keyblock: Fix argument to PrivateKeyReadPem()

If the --signprivate_pem option is used to vbutil_keyblock and without
an external signer, we were passing the wrong name to PrivateKeyReadPem()
causing all such invocations to fail. This CL fixes the typo.

(This particular path isn't current being used.)

BUG=none
TEST=manually verified with --signprivatekey_pem but without --external_signer.
BRANCH=none

Change-Id: I56df76a965706f654df1de8ac6e42738c15284c7
Reviewed-on: https://gerrit.chromium.org/gerrit/31556
Commit-Ready: Gaurav Shah <gauravsh@chromium.org>
Reviewed-by: Gaurav Shah <gauravsh@chromium.org>
Tested-by: Gaurav Shah <gauravsh@chromium.org>
1 file changed