Simplify the bytecode for the 80-10FFFF rune range.

Change-Id: I9185a44413375b207b5a050dda8d4c601c501eff
Reviewed-on: https://code-review.googlesource.com/c/re2/+/49270
Reviewed-by: Paul Wankadia <junyer@google.com>
3 files changed