Add --stringify flag to sksl-minify.

This enables wrapping the code in a constexpr char array. By default,
this feature is no longer enabled. However, our python wrapper in
minify_sksl.py will always add this flag when running the minifier.

Change-Id: I977f84e62e8e7122e270f374c43bf7142672e091
Bug: skia:13822
Reviewed-on: https://skia-review.googlesource.com/c/skia/+/592636
Reviewed-by: Brian Osman <brianosman@google.com>
Auto-Submit: John Stiles <johnstiles@google.com>
Commit-Queue: Brian Osman <brianosman@google.com>
2 files changed