Enable -Werror for all of qtsvg

Change-Id: Ica038c81648e3d3c7c2418aacf40eef1f62602b6
Reviewed-by: Robin Burchell <robin+qt@viroteck.net>
Remove unused pmKey function

Found by Clang 3.4.

Change-Id: Ie4e9fc535ee44caae561aacdc245c64ea5b30b46
Reviewed-by: Robin Burchell <robin+qt@viroteck.net>
Bump MODULE_VERSION to 5.2.2

Change-Id: I0145b33ec2f7cec39b894ea512e2c1119b99dba1
Reviewed-by: Thiago Macieira <thiago.macieira@intel.com>
MER: Add packaging.
MER: Remove plugin cmake descriptors.

Devel packages do not contain everything, so we don't want these.