Fixes to Android.mk generation for arm64.

Remove warning about no optimizations for arm64 and rebaseline the
associated test.

Exclude _opts_none.cpps when building arm64, to avoid double definitions.

BUG=skia:1975
R=halcanary@google.com, djsollen@google.com

Author: scroggo@google.com

Review URL: https://codereview.chromium.org/229393002

git-svn-id: http://skia.googlecode.com/svn/trunk@14104 2bbb7eff-a529-9590-31e7-b0007b416f81
3 files changed