Don't filter out Cairo libraries from GTK libraries list in configure.

This undoes the hack of r35357 which surreptitiously removed all Cairo
libraries from the GTK libraries list. This shouldn't be necessary any more as
we use Cairo calls in our own code and so can't run without it anyhow and in
fact is even actively harmful as it results in linking errors under Fedora 13
(which seems to use a slightly different linker?).

git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/trunk@65489 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775