Add inline threshold to SkSL::Program::Settings

Keep the same default value, but add a (private) API to change it when
compiling SkRuntimeEffect code.

Use the new API to improve fuzzer coverage, by fuzzing with inlining
disabled and (enthusiastically) enabled.

Change-Id: I36424bac95144aeb727cfb949754fbe998d5d7de
Reviewed-on: https://skia-review.googlesource.com/c/skia/+/308181
Commit-Queue: Brian Osman <brianosman@google.com>
Reviewed-by: Kevin Lubick <kjlubick@google.com>
Reviewed-by: Ethan Nicholas <ethannicholas@google.com>
6 files changed