Revert of Roll src/third_party/boringssl/src 68de407:65a7e94 (patchset #2 id:20001...

Revert of Roll src/third_party/boringssl/src 68de407:65a7e94 (patchset #2 id:20001 of https://codereview.chromium.org/1122423007/)

Reason for revert:
http://build.chromium.org/p/chromium.linux/builders/Android%20Clang%20Builder%20%28dbg%29/builds/59288

Looks like the __STDC_FORMAT_MACROS thing got lost when inttypes.h and BN_FMT_* were moved to a public header. That it's a public header is... problematic...

Original issue's description:
> Roll src/third_party/boringssl/src 68de407:65a7e94
>
> Summary of changes available at:
> https://boringssl.googlesource.com/boringssl/+log/68de407..65a7e94
>
> This also removes update_gypi_and_asm.py in favor of the script inside
> BoringSSL proper.
>
> BUG=none
>
> Committed: https://crrev.com/c80637399c13d7c3e8cb7a16bd5de104feb449e9
> Cr-Commit-Position: refs/heads/master@{#329032}

TBR=agl@chromium.org
NOPRESUBMIT=true
NOTREECHECKS=true
NOTRY=true
BUG=none

Review URL: https://codereview.chromium.org/1132243002

Cr-Commit-Position: refs/heads/master@{#329035}