Make --is-base-module action store_true

By default the option consumes the next flag, which happens to be
--native-libs=libcrashpad_handler.so for chrome modern bundle modules.

Bug: 960534
Change-Id: I09c3df3c6433a85006c7143256cec2a51e14976e
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/1622661
Auto-Submit: Joshua Peraza <jperaza@chromium.org>
Reviewed-by: Eric Stevenson <estevenson@chromium.org>
Commit-Queue: Eric Stevenson <estevenson@chromium.org>
Commit-Queue: Joshua Peraza <jperaza@chromium.org>
Cr-Commit-Position: refs/heads/master@{#662028}
1 file changed