Fix type in package_source
Fix type in package_source

TBR=phajdan.jr@chromium.org
BUG=none

Review URL: https://codereview.chromium.org/239373003

git-svn-id: 239fca9b83025a0b6f823aeeca02ba5be3d9fd76@263878 0039d316-1c4b-4281-b951-d872f2087c98

eunchong/build,eunchong/build,eunchong/build,eunchong/build