Add particle entry points to externs.js to fix missing symbols

Bug: skia:9513
Change-Id: Ibaf3ad930fdc0072916143dea63142ca0c6e4aeb
Reviewed-on: https://skia-review.googlesource.com/c/skia/+/257050
Commit-Queue: Brian Osman <brianosman@google.com>
Auto-Submit: Brian Osman <brianosman@google.com>
Reviewed-by: Kevin Lubick <kjlubick@google.com>
1 file changed