util: Ignore twister-out* in config_option_check
util: Ignore twister-out* in config_option_check

If you have a lot of twister-out dirs, the config_option_check.py
script gets really slow.

BRANCH=None
BUG=None
TEST=util/config_option_check.py with 20 twister-out.* dirs

Signed-off-by: Jeremy Bettis <4df7b5147fee087dca33c181f288ee7dbf56e022@google.com>
Change-Id: Ia246d610bad4a1aa9923140c8d424262209ff340
Reviewed-on: https://chromium-review.googlesource.com/c/chromiumos/platform/ec/+/3957260
Commit-Queue: Jeremy Bettis <4df7b5147fee087dca33c181f288ee7dbf56e022@chromium.org>
Reviewed-by: Keith Short <f6d578f97033c25f1206cb57d52f358974c82954@chromium.org>
Auto-Submit: Jeremy Bettis <4df7b5147fee087dca33c181f288ee7dbf56e022@chromium.org>
Tested-by: Jeremy Bettis <4df7b5147fee087dca33c181f288ee7dbf56e022@chromium.org>
Commit-Queue: Keith Short <f6d578f97033c25f1206cb57d52f358974c82954@chromium.org>

coreboot/chrome-ec,coreboot/chrome-ec,coreboot/chrome-ec,coreboot/chrome-ec,coreboot/chrome-ec,coreboot/chrome-ec