tcmalloc: fixed config_linux.h to build for arm targets.

BUG=chromium-os:34620
TEST=trybot


Review URL: https://chromiumcodereview.appspot.com/10970030

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@158903 0039d316-1c4b-4281-b951-d872f2087c98
1 file changed