Add array initializer

Generate an array with initialized values based on
a function of the index.

Change-Id: I1d7d83ba9cacde47b8c736f26dedc15294929937
Reviewed-on: https://skia-review.googlesource.com/c/skia/+/289489
Reviewed-by: Mike Klein <mtklein@google.com>
Reviewed-by: Ben Wagner <bungeman@google.com>
Commit-Queue: Herb Derby <herb@google.com>
2 files changed