Fix linux build_dir on chromium.endure.
Fix linux build_dir on chromium.endure.

R=xusydoc@chromium.org
BUG=

Review URL: https://codereview.chromium.org/12818002

git-svn-id: 239fca9b83025a0b6f823aeeca02ba5be3d9fd76@188523 0039d316-1c4b-4281-b951-d872f2087c98

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