[MIPS] Add missing MIPS clause in untrusted.gypi
[MIPS] Add missing MIPS clause in untrusted.gypi

Build MIPS IRT shim with PNaCl.

BUG= https://code.google.com/p/nativeclient/issues/detail?id=2275
TEST= build Chromium with NaCl turned on

Review URL: https://codereview.chromium.org/177113004

git-svn-id: 721b910a23eff8a86f00c8fd261a7587cddf18f8@12803 fcba33aa-ac0c-11dd-b9e7-8d5594d729c2

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