Ignore profraw files generated by -Cinstrument-coverage

Author: tokenrove

.gitignore

@@ -28,6 +28,7 @@ junit_*.xml
 perf.data*
 **/*.rej
 **/*.orig
+**/*.profraw
 
 # This is un-orthodox, but adding it to the repo would "tie" it to each users
 # local version of nixpkgs. This way, we can all use the flake and have a