util/lint: Ignore whitespace, newlines, and licenses in vbt files

Change-Id: I84f612db058d83936ddd5a6baa32c993e5b0f594
Signed-off-by: Martin Roth <martinroth@google.com>
Reviewed-on: https://review.coreboot.org/26064
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Patrick Georgi <pgeorgi@google.com>

util/lint/lint-000-license-headers

@@ -34,6 +34,7 @@ EXAMPLE|\
 \.jpg$|\
 \.cksum$|\
 \.bin$|\
+\.vbt$|\
 \.hex$|\
 \.patch$|\
 _shipped$|\