addlink: add PyMySQL dependency
addlink: add PyMySQL dependency

Bug: T279411
Change-Id: I25b480409735f39b5c1ef6f0ad834091c58099bf
Depends-On: I1e873f39ff03aa0df3f5144d72f9930cfbe1b834

wikimedia/mediawiki-vagrant,wikimedia/mediawiki-vagrant,wikimedia/mediawiki-vagrant,wikimedia/mediawiki-vagrant,wikimedia/mediawiki-vagrant,wikimedia/mediawiki-vagrant