bitbucket-pipelines.yml: Change `make check` to `make distcheck`
Now that `make distcheck` should succeed, we can just use it as it
internally does `make check`. This patch changes the BitBucket
pipeline file to do so.
[Desktop Entry]
_Name=Pidgin Internet Messenger
_GenericName=Internet Messenger
_Comment=Chat over IM. Supports AIM, Google Talk, Jabber/XMPP, MSN, Yahoo and more