fromupstream: Fix parsing of pw:// names with numbers

The fromupstream script was unable to figure out how to parse:
  fromupstream.py -b=... -t=... pw://linux-i2c/1108802

Because there was a number in the project name.  Let's just say that
the project can have any characters in it except a "/".

BUG=None
TEST=Run command from commit message

Change-Id: Ibe591dc01b7a685b6cd32d741025be98b911b0e4
Reviewed-on: https://chromium-review.googlesource.com/1639367
Commit-Ready: Douglas Anderson <[email protected]>
Tested-by: Douglas Anderson <[email protected]>
Legacy-Commit-Queue: Commit Bot <[email protected]>
Reviewed-by: Brian Norris <[email protected]>
Reviewed-by: Guenter Roeck <[email protected]>
1 file changed