[WK2] One more unreviewed buildfix for EFL, GTK and Qt after r144218.

Patch by Csaba Osztrogonác <ossy@webkit.org> on 2013-02-27

* CMakeLists.txt:
* GNUmakefile.list.am:
* Target.pri:
* WebProcess/Storage/StorageNamespaceProxy.cpp:
(WebKit::StorageNamespaceProxy::copy):

git-svn-id: http://svn.webkit.org/repository/webkit/trunk@144246 268f45cc-cd09-0410-ab3c-d52691b4dbfc