use Fusion style with Qt5

git-svn-id: svn+ssh://svn.kde.org/home/kde/branches/work/kst/portto4/kst@1333220 283d02a7-25f6-0310-bc7c-ecb5cbfe19da
build server is now 64bit, Qt5 released

git-svn-id: svn+ssh://svn.kde.org/home/kde/branches/work/kst/portto4/kst@1333221 283d02a7-25f6-0310-bc7c-ecb5cbfe19da
build also 32bit version

git-svn-id: svn+ssh://svn.kde.org/home/kde/branches/work/kst/portto4/kst@1333807 283d02a7-25f6-0310-bc7c-ecb5cbfe19da
also build 3rdparty plugins