[453701] Add support for Windows Phone 8 platform

Add platform filters and update pom files of wp plugins.

Bug: https://bugs.eclipse.org/bugs/show_bug.cgi?id=453701
Change-Id: I1bc74a334bfac7f93a0df850cfcfeb45cbf6a067
Signed-off-by: wgalanciak <wojciech.galanciak@gmail.com>