Correct fix to find_packages_of().

The previous fix inadvertently removed a "break" statement.
This change restores it.

BUG=chromium:220828
TEST=manually doctor a test to make it crash and hit this statement

Change-Id: I7fe0c3f6c0ee66b476ea55748aad3f331000598a
Reviewed-on: https://chromium-review.googlesource.com/241100
Trybot-Ready: Frank Henigman <fjhenigman@chromium.org>
Reviewed-by: Mike Frysinger <vapier@chromium.org>
Commit-Queue: Frank Henigman <fjhenigman@chromium.org>
Tested-by: Frank Henigman <fjhenigman@chromium.org>
1 file changed