[MIPS] Disable Python IMC tests
[MIPS] Disable Python IMC tests

Skip running python_imc for MIPS as we are missing correct Python package.

BUG= run_python_imc_test fails on MIPS
TEST= run_python_imc_test

Review URL: https://chromiumcodereview.appspot.com/22578007

git-svn-id: 721b910a23eff8a86f00c8fd261a7587cddf18f8@11962 fcba33aa-ac0c-11dd-b9e7-8d5594d729c2

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