jquery-mobile : new package

Since version 1.4 jquery-mobile includes the core-jquery.
No need for extra dependencies.

[Thomas: remove trailing spaces in Config.in file, and rewrap help
text.]

Signed-off-by: Sagaert Johan <sagaert.johan@skynet.be>
Signed-off-by: Thomas Petazzoni <thomas.petazzoni@free-electrons.com>