no more need for a constants pointer

The only reason we were keeping SkJumper_constants around is that it was
hard to get float/integer iota vectors on arm64 without relocations.

Now that we're compiling arm64 normally as part of Skia, we don't have
to worry about relocations.

This means we can kill the struct and stop passing around that pointer.

Change-Id: I013c6a735947f3db2bc87f2bfa38b7520d2e2fce
Reviewed-on: https://skia-review.googlesource.com/40200
Commit-Queue: Mike Klein <mtklein@chromium.org>
Reviewed-by: Herb Derby <herb@google.com>
7 files changed