Disable inbrowser_crash_test on Linux
Disable inbrowser_crash_test on Linux

This test seems to be flaky, on Linux, so we are disabling it until
we have a fix.

BUG= http://code.google.com/p/nativeclient/issues/detail?id=2173
TEST= none
Review URL: http://codereview.chromium.org/7757009

git-svn-id: 721b910a23eff8a86f00c8fd261a7587cddf18f8@6563 fcba33aa-ac0c-11dd-b9e7-8d5594d729c2

sbc100/native_client,sbc100/native_client,nacl-webkit/native_client,nacl-webkit/native_client,nacl-webkit/native_client,sbc100/native_client,sbc100/native_client,nacl-webkit/native_client,sbc100/native_client,nacl-webkit/native_client,sbc100/native_client