Revert the revert of the revert of the revert.  (Turn on arm tests on x86-64.)
Revert the revert of the revert of the revert.  (Turn on arm tests on x86-64.)

It sure would be nice if our try bots were working / consistent with
our build bots....  Now that the clang and asan detected bugs are
fixed, this surely will land without problems.  Don't call me Shirley.
Looks like I picked the wrong day to quit sniffing glue.

R=jfb@chromium.org
BUG= none
TEST= these are a binder full of tests

Review URL: https://codereview.chromium.org/23444028

git-svn-id: 721b910a23eff8a86f00c8fd261a7587cddf18f8@12093 fcba33aa-ac0c-11dd-b9e7-8d5594d729c2

sbc100/native_client,sbc100/native_client,sbc100/native_client,sbc100/native_client,sbc100/native_client,sbc100/native_client