NaCl: Update revision in DEPS, r13921 -> r13931
NaCl: Update revision in DEPS, r13921 -> r13931

This pulls in the following Native Client changes:

r13922: (shyamsundarr) cleanup special case compatibility with old validator for avx.
r13923: (mcgrathr) Update nacl_arm_newlib toolchain
r13924: (dschuff) PNaCl: Update LLVM revision in pnacl/COMPONENT_REVISIONS
r13925: (shyamsundarr) fix the check_decoder_test.
r13926: (dschuff) Fix build directory for LLVM regression test runner
r13927: (dschuff) Update revision for PNaCl r13918->r13925
r13928: (dyen) Disable flaky IRT extension thread tests on asan mac bots.
r13931: (shyamsundarr) fix lahf feature detection.

BUG=none
TEST=browser_tests and nacl_integration
CQ_EXTRA_TRYBOTS=tryserver.chromium.linux:linux_rel_precise32,linux_nacl_sdk,linux_chromium_dbg

Review URL: https://codereview.chromium.org/662473004

Cr-Commit-Position: 972c6d2dc6dd5efdad1377c0d224e03eb8f276f7@{#300149}

Pluto-tv/chromium-crosswalk,Pluto-tv/chromium-crosswalk,Just-D/chromium-1,Jonekee/chromium.src,ltilve/chromium,mohamed--abdel-maksoud/chromium.src,Just-D/chromium-1,krieger-od/nwjs_chromium.src,hgl888/chromium-crosswalk,axinging/chromium-crosswalk,fujunwei/chromium-crosswalk,axinging/chromium-crosswalk,mohamed--abdel-maksoud/chromium.src,PeterWangIntel/chromium-crosswalk,hgl888/chromium-crosswalk,ltilve/chromium,TheTypoMaster/chromium-crosswalk,M4sse/chromium.src,TheTypoMaster/chromium-crosswalk,Just-D/chromium-1,fujunwei/chromium-crosswalk,markYoungH/chromium.src,hgl888/chromium-crosswalk,dushu1203/chromium.src,Jonekee/chromium.src,Fireblend/chromium-crosswalk,jaruba/chromium.src,chuan9/chromium-crosswalk,markYoungH/chromium.src,ltilve/chromium,Jonekee/chromium.src,jaruba/chromium.src,Just-D/chromium-1,axinging/chromium-crosswalk,TheTypoMaster/chromium-crosswalk,Jonekee/chromium.src,jaruba/chromium.src,krieger-od/nwjs_chromium.src,dushu1203/chromium.src,Chilledheart/chromium,krieger-od/nwjs_chromium.src,dushu1203/chromium.src,fujunwei/chromium-crosswalk,Just-D/chromium-1,Jonekee/chromium.src,axinging/chromium-crosswalk,M4sse/chromium.src,Pluto-tv/chromium-crosswalk,axinging/chromium-crosswalk,markYoungH/chromium.src,Pluto-tv/chromium-crosswalk,markYoungH/chromium.src,hgl888/chromium-crosswalk,axinging/chromium-crosswalk,dushu1203/chromium.src,krieger-od/nwjs_chromium.src,Chilledheart/chromium,Pluto-tv/chromium-crosswalk,ltilve/chromium,krieger-od/nwjs_chromium.src,mohamed--abdel-maksoud/chromium.src,Pluto-tv/chromium-crosswalk,axinging/chromium-crosswalk,M4sse/chromium.src,Fireblend/chromium-crosswalk,PeterWangIntel/chromium-crosswalk,M4sse/chromium.src,dednal/chromium.src,dednal/chromium.src,markYoungH/chromium.src,Fireblend/chromium-crosswalk,fujunwei/chromium-crosswalk,krieger-od/nwjs_chromium.src,hgl888/chromium-crosswalk,dushu1203/chromium.src,Just-D/chromium-1,jaruba/chromium.src,axinging/chromium-crosswalk,jaruba/chromium.src,Chilledheart/chromium,dushu1203/chromium.src,M4sse/chromium.src,krieger-od/nwjs_chromium.src,fujunwei/chromium-crosswalk,dednal/chromium.src,axinging/chromium-crosswalk,dednal/chromium.src,dednal/chromium.src,M4sse/chromium.src,dednal/chromium.src,Chilledheart/chromium,Pluto-tv/chromium-crosswalk,chuan9/chromium-crosswalk,fujunwei/chromium-crosswalk,chuan9/chromium-crosswalk,mohamed--abdel-maksoud/chromium.src,ltilve/chromium,Pluto-tv/chromium-crosswalk,hgl888/chromium-crosswalk,Just-D/chromium-1,dednal/chromium.src,krieger-od/nwjs_chromium.src,fujunwei/chromium-crosswalk,TheTypoMaster/chromium-crosswalk,Chilledheart/chromium,TheTypoMaster/chromium-crosswalk,Chilledheart/chromium,Jonekee/chromium.src,mohamed--abdel-maksoud/chromium.src,TheTypoMaster/chromium-crosswalk,M4sse/chromium.src,Jonekee/chromium.src,mohamed--abdel-maksoud/chromium.src,markYoungH/chromium.src,Fireblend/chromium-crosswalk,markYoungH/chromium.src,chuan9/chromium-crosswalk,chuan9/chromium-crosswalk,Just-D/chromium-1,markYoungH/chromium.src,TheTypoMaster/chromium-crosswalk,mohamed--abdel-maksoud/chromium.src,ltilve/chromium,dednal/chromium.src,dushu1203/chromium.src,fujunwei/chromium-crosswalk,Jonekee/chromium.src,PeterWangIntel/chromium-crosswalk,markYoungH/chromium.src,dushu1203/chromium.src,hgl888/chromium-crosswalk,axinging/chromium-crosswalk,M4sse/chromium.src,krieger-od/nwjs_chromium.src,PeterWangIntel/chromium-crosswalk,Chilledheart/chromium,Chilledheart/chromium,chuan9/chromium-crosswalk,PeterWangIntel/chromium-crosswalk,dednal/chromium.src,Jonekee/chromium.src,jaruba/chromium.src,fujunwei/chromium-crosswalk,krieger-od/nwjs_chromium.src,hgl888/chromium-crosswalk,mohamed--abdel-maksoud/chromium.src,Fireblend/chromium-crosswalk,dushu1203/chromium.src,Pluto-tv/chromium-crosswalk,Just-D/chromium-1,markYoungH/chromium.src,Fireblend/chromium-crosswalk,TheTypoMaster/chromium-crosswalk,chuan9/chromium-crosswalk,Fireblend/chromium-crosswalk,Fireblend/chromium-crosswalk,jaruba/chromium.src,chuan9/chromium-crosswalk,axinging/chromium-crosswalk,markYoungH/chromium.src,jaruba/chromium.src,mohamed--abdel-maksoud/chromium.src,dushu1203/chromium.src,M4sse/chromium.src,hgl888/chromium-crosswalk,jaruba/chromium.src,PeterWangIntel/chromium-crosswalk,jaruba/chromium.src,dushu1203/chromium.src,jaruba/chromium.src,PeterWangIntel/chromium-crosswalk,PeterWangIntel/chromium-crosswalk,ltilve/chromium,dednal/chromium.src,Chilledheart/chromium,TheTypoMaster/chromium-crosswalk,M4sse/chromium.src,Jonekee/chromium.src,krieger-od/nwjs_chromium.src,mohamed--abdel-maksoud/chromium.src,M4sse/chromium.src,ltilve/chromium,dednal/chromium.src,ltilve/chromium,Jonekee/chromium.src,PeterWangIntel/chromium-crosswalk,chuan9/chromium-crosswalk,mohamed--abdel-maksoud/chromium.src,Fireblend/chromium-crosswalk