More store tests for the ARM validator: - An explicit negative test for stores we do not allow. - Tests of vector stores, both those that can be conditional and those that can't.
More store tests for the ARM validator:
- An explicit negative test for stores we do not allow.
- Tests of vector stores, both those that can be conditional and those that can't.

This now evaluates 6,920 programs in 20ms.

BUG=http://code.google.com/p/nativeclient/issues/detail?id=823 
TEST=run_arm_validator_tests 

Review URL: http://codereview.chromium.org/3190012

git-svn-id: 721b910a23eff8a86f00c8fd261a7587cddf18f8@3074 fcba33aa-ac0c-11dd-b9e7-8d5594d729c2

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