Wrap built-in symbol tables when a switch statement is cloned.

Switch statements were not caught when originally implementing
http://review.skia.org/328384.

Change-Id: Iff21e5743bf6a604e13c45a736799b4929844472
Reviewed-on: https://skia-review.googlesource.com/c/skia/+/328900
Commit-Queue: John Stiles <johnstiles@google.com>
Commit-Queue: Brian Osman <brianosman@google.com>
Auto-Submit: John Stiles <johnstiles@google.com>
Reviewed-by: Brian Osman <brianosman@google.com>
Reviewed-by: Ethan Nicholas <ethannicholas@google.com>
1 file changed