build_packages: Remove empty lines from equery result.

BUG=chromium:1134542
TEST=cros workon -b eve start authpolicy dlcservice
TEST=./build_packages --board=eve

Change-Id: Ie15792d5388c1a9a5a3ab390656a0614834c5854
Reviewed-on: https://chromium-review.googlesource.com/c/chromiumos/platform/crosutils/+/2445805
Commit-Queue: Alex Klein <saklein@chromium.org>
Tested-by: Alex Klein <saklein@chromium.org>
Reviewed-by: Chris McDonald <cjmcdonald@chromium.org>
1 file changed