Use LC_ALL=C rather than LANG=en_US.UTF-8 in build_nexe.py
Use LC_ALL=C rather than LANG=en_US.UTF-8 in build_nexe.py

build_nexe.py controls the environment in which it runs the NaCl toolchain
readelf so that the output text will match an expected format exactly,
including messages that might be translated.  LC_ALL=C is the reliable and
canonical way to get the default (English) messages.  LANG is overridden by
other variables such as LANGUAGE.

BUG= none
TEST= trybots + local gyp_compile with LANGUAGE=fr_FR.UTF-8
R=jvoung@chromium.org

Review URL: https://codereview.chromium.org/329333002

git-svn-id: 721b910a23eff8a86f00c8fd261a7587cddf18f8@13325 fcba33aa-ac0c-11dd-b9e7-8d5594d729c2

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