jquery-validation: bump to version 1.12.0

Switch homepage and upstream source, add license file (just mentions
it's under MIT, better than none). Also fixes:
http://autobuild.buildroot.net/results/a2e/a2ed2efe09b12612247a21c5fa3c129f58c9afd8/



Signed-off-by: Gustavo Zacarias <gustavo@zacarias.com.ar>
Signed-off-by: Thomas Petazzoni <thomas.petazzoni@free-electrons.com>