Revert of roll to r1470 (patchset #1 id:1 of https://codereview.chromium.org/12954030...

Revert of roll to r1470 (patchset #1 id:1 of https://codereview.chromium.org/1295403004/ )

Reason for revert:
https://chromium.googlesource.com/libyuv/libyuv/+/94d4269936472587ca201df4287b6c5a22dc85ff makes clang-cl crash: http://build.chromium.org/p/chromium.fyi/builders/CrWinClang/builds/2679/steps/compile/logs/stdio

Original issue's description:
> libyuv roll to r1470 from r1466
>
> Purpose of this roll is to enable lto for arm llvm builds:
> Re-enable LLVM LTO on Neon targets.
>
> LTO was disabled due to a GCC compiler bug that does not affect LLVM.
> This fixes the build in the cfi_vptr==1 configuration, which requires LLVM LTO.
>
> Contains the following libyuv revisions:
> https://chromium.googlesource.com/libyuv/libyuv/+log/cda9d38a4..ee9aaea02
>
> R=pcc@google.com
> BUG=chromium:469376,chromium:267773
>
> Committed: https://crrev.com/c833aa136c0ed81455c4e6085e4703a100f24348
> Cr-Commit-Position: refs/heads/master@{#344659}

TBR=pcc@chromium.org,fbarchard@chromium.org,jam@chromium.org,fbarchard@google.com
NOPRESUBMIT=true
NOTREECHECKS=true
NOTRY=true
BUG=chromium:469376,chromium:267773

Review URL: https://codereview.chromium.org/1302373003

Cr-Commit-Position: refs/heads/master@{#344800}