MIPS: Skip embenchen tests on big-endian.

MIPS: Skip embenchen tests on big-endian.

Emscripten requires little-endian arch. It has assertion for endianness:

assert(HEAPU8[0] === 255 && HEAPU8[3] === 0,
    'Typed arrays 2 must be run on a little-endian system');

TEST=mjsunit/asm/embenchen/*
BUG=
R=bmeurer@chromium.org

Committed: https://code.google.com/p/v8/source/detail?r=25177

[paul.l..., 2014-11-06 02:30:23]

paul.lind@imgtec.com changed reviewers:
+ akos.palfi@imgtec.com, balazs.kilvady@imgtec.com, bmeurer@chromium.org,
danno@chromium.org, dusan.milosavljevic@imgtec.com, machenbach@chromium.org

[paul.l..., 2014-11-06 02:30:23]

PTAL.

[Benedikt Meurer, 2014-11-06 06:17:59]

lgtm

[Benedikt Meurer, 2014-11-06 06:18:35]

Committed patchset #1 (id:1) manually as 25177 (presubmit successful).