Add directions for when trouble strikes in fetch-skps.

Change-Id: I53c02c12a327f6484f4e45777c0168065adfae75
Reviewed-on: https://skia-review.googlesource.com/91080
Reviewed-by: Ravi Mistry <rmistry@google.com>
Commit-Queue: Herb Derby <herb@google.com>
1 file changed