crash: Shorten crash-reporter project alias. Add a .project_alias file so that crash reporter changes can/must be prefixed with "crash: " rather than "crash-reporter: ". BUG=none TEST=uploaded this change Change-Id: Iea849873cb061650909eecdc911d8805f17bc4c5 Reviewed-on: https://chromium-review.googlesource.com/244240 Reviewed-by: Ben Chan <[email protected]> Reviewed-by: Dan Erat <[email protected]> Commit-Queue: Dan Erat <[email protected]> Tested-by: Dan Erat <[email protected]>