Commit appraisals gemfile locks

I don't know why the gemfile locks from appraisals
weren't being included.

But they are helpful to keep - just like the main Gemfile.

I don't see why not committing them. Open to be convinced of
the contrary though.

.gitignore

@@ -5,7 +5,6 @@
 *~
 .bundle
 db/*.sqlite3
-gemfiles/*.lock
 gemfiles/vendor/
 log/*.log
 pkg