Add avx512 compile test.
authorTom Finegan <tomfinegan@google.com>
Thu, 7 Jun 2018 19:35:05 +0000 (12:35 -0700)
committerTom Finegan <tomfinegan@google.com>
Thu, 7 Jun 2018 23:05:48 +0000 (16:05 -0700)
commit393f7856587d58292febb0a3e82edc405aab4498
treead45c3a673293403f9112d5d35a43d8398f54026
parente32f0bf2399bfba4cda1f04f56bc2b05a2d34354
Add avx512 compile test.

Some compiler releases allow the -mavx512f arg without actually
implementing support. Test for this situation, and disable avx512
when it is detected by configure.

BUG=webm:1536

Change-Id: I63952153bb4b24aa9f25267ed47a0fe845d61f8b
build/make/configure.sh