Roll src/native_client/ 5fd19bf66..bd5edeb19 (6 commits).
Roll src/native_client/ 5fd19bf66..bd5edeb19 (6 commits).

https://chromium.googlesource.com/native_client/src/native_client.git/+log/5fd19bf665df..bd5edeb19e14

$ git log 5fd19bf66..bd5edeb19 --date=short --no-merges --format='%ad %ae %s'
2016-02-23 sbc Revert of Remove arm-nacl-gcc newlib toolchain (patchset #1 id:1 of https://codereview.chromium.org/1710103002/ )
2016-02-23 sbc Sync standalone_flags.gypi with chromium's common.gypi
2016-02-23 sbc Fixes from webports for building untrusted pnacl toolchain
2016-02-23 mcgrathr toolchain_build: Update nacl_arm_glibc to 2.23
2016-02-23 mcgrathr toolchain_build: Update binutils to 2.26 in nacl_arm_glibc
2016-02-23 phosek Remove Emscripten support

CQ_INCLUDE_TRYBOTS=tryserver.chromium.linux:linux_chromium_dbg_32_ng,linux_nacl_sdk_build
TBR=mseaborn@chromium.org

Review URL: https://codereview.chromium.org/1722403002

Cr-Commit-Position: 972c6d2dc6dd5efdad1377c0d224e03eb8f276f7@{#377125}

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