JUMPER_IS_AVX2 -> JUMPER_IS_HSW

We need to be a bit more pedantic here to support builds that may be
using AVX2 as part of their baseline but perhaps not enabling all the
related features SkJumper would like to use.

E.g. we've seen Tensorflow build with AVX2 and FMA, but not F16C.

So check all three {AVX2,FMA,F16C}, and only then build stages in HSW
mode.  I've updated the define as a reminder.

This only affects builds using these features for their _baseline_
stages... the offline-compiled stages in SkJumper_generated.S are
not affected.

Change-Id: I9bfb3bae3589d35043b748782cefa8c213726d6a
Reviewed-on: https://skia-review.googlesource.com/84221
Reviewed-by: Florin Malita <fmalita@chromium.org>
Commit-Queue: Mike Klein <mtklein@chromium.org>
2 files changed