Fix slave dir path in the Makefile to ensure that launchd is used on mac.
Fix slave dir path in the Makefile to ensure that launchd is used
on mac.

Review URL: http://codereview.chromium.org/4140001

git-svn-id: 239fca9b83025a0b6f823aeeca02ba5be3d9fd76@63813 0039d316-1c4b-4281-b951-d872f2087c98

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