android/clang: Don't add path to gold shim to PATH, use -B instead.

No intended behavior change.

BUG=330631
R=torne@chromium.org

Review URL: https://codereview.chromium.org/150863002

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@248080 0039d316-1c4b-4281-b951-d872f2087c98
SVN changes up to revision 248080