Disable NaClBrowserTestGLibcVcacheExtension.ValidationCacheOfMainNexe on ARM.

Disable NaClBrowserTestGLibcVcacheExtension.ValidationCacheOfMainNexe on ARM.

NaCl does not support glibc on ARM so all glibc-related
tests should be disabled on ARM.

BUG=422592
TEST=linux_arm trybot

Committed: https://crrev.com/7c8d1ab8e83a2aa5a635b3e77cdf02b7297692ca
Cr-Commit-Position: refs/heads/master@{#299808}

[Sam Clegg, 2014-10-13 21:44:59]

sbc@chromium.org changed reviewers:
+ mseaborn@chromium.org

[Mark Seaborn, 2014-10-13 22:04:59]

"doesn't not" -> "does not".  LGTM.

[Sam Clegg, 2014-10-15 23:33:40]

The CQ bit was checked by sbc@chromium.org

[commit-bot: I haz the power, 2014-10-15 23:35:02]

CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/652873002/1

[commit-bot: I haz the power, 2014-10-16 01:23:15]

Committed patchset #1 (id:1)

[commit-bot: I haz the power, 2014-10-16 01:23:19]

Patchset 1 (id:??) landed as
https://crrev.com/7c8d1ab8e83a2aa5a635b3e77cdf02b7297692ca
Cr-Commit-Position: refs/heads/master@{#299808}