Add GeoDNS for secondary/deprecated mobile domains

While our main $lang.m.wikipedia.org domains were all switched to the
geo service IP m.wikipedia.org, several deprecated and secondary domains
(wap, mobile, test.m etc.) were still pointed to mobile-lb.eqiad, back
from the times when mobile existed only in eqiad. Fix this and make our
config consistent.

Change-Id: I3811f1a49299e95577b2e955e18edd58e1ba7063
Add www.m.wikipedia.org

The mobile redirects would redirect www.wikipedia.org to www.m, and it's
also an easy typo to make, so it's reasonable enough to have it.

Change-Id: I632ad99c3d9b27c9012c0ac0a565ead3f740fb48