Add a new portageq helper to reduce a string containing use conditionals

BUG=chromium:331853
TEST=verify autotest ebuild still build tests

https://chromium-review.googlesource.com/181876

Change-Id: I6c1cee0902bce794872e459ec82167d21e50e75b
Reviewed-on: https://chromium-review.googlesource.com/214528
Reviewed-by: Mike Frysinger <vapier@chromium.org>
Tested-by: Bertrand Simonnet <bsimonnet@chromium.org>
1 file changed