Reduced size of SkSL lexer tables

The SkSL lexer tables contain duplicate rows, as many characters have the same
transitions (for instance, every lexer rule treats all digits [0-9] the
same way, so that means ten rows with identical transitions). This change
collapses such duplicate rows.

Bug: 764430
Change-Id: I83040692f847e3aff8069fddbe975a007f4b383c
Reviewed-on: https://skia-review.googlesource.com/48263
Reviewed-by: Brian Salomon <bsalomon@google.com>
Commit-Queue: Ethan Nicholas <ethannicholas@google.com>
8 files changed