Stop testing builds with runtime-detected NEON

O frabjous day!

Chrome has switched on requiring NEON globally at head.
Android has always built with NEON as appropriate for each device.

In practice, this switches our Nexus 5 bots from runtime-detected to
building with NEON globally.  It also lines a few columns up and makes
equivalent aliases more obviously the same.

We still have Build bots to test we can build on ARMv7 with no NEON.  (We even have Build bots to test building ARMv6.)

(It looks like that buildbot_spec.json just hasn't been updated in a while.)

BUG=skia:
GOLD_TRYBOT_URL= https://gold.skia.org/search2?unt=true&query=source_type%3Dgm&master=false&issue=1612753002

CQ_EXTRA_TRYBOTS=client.skia.android:Perf-Android-GCC-Nexus5-CPU-NEON-Arm7-Release-Trybot,Test-Android-GCC-Nexus5-CPU-NEON-Arm7-Debug-Trybot,Test-Android-GCC-Nexus5-CPU-NEON-Arm7-Release-Trybot

Review URL: https://codereview.chromium.org/1612753002
2 files changed