bin/try: Add interactive mode

Bug: skia:
Change-Id: Iceb1834f1a3aa7594227ff3adf187c650aa30367
Reviewed-on: https://skia-review.googlesource.com/61480
Commit-Queue: Eric Boren <borenet@google.com>
Reviewed-by: Ravi Mistry <rmistry@google.com>
1 file changed