Renamed Variant to BVariant and moved it to libshared.a.


git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@31127 a95241bf-73f2-0310-859d-f6bbb57e9c96

Apparently forgot to add those in r30414.


git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@30416 a95241bf-73f2-0310-859d-f6bbb57e9c96