reworked makelib.env so that it now can create shared libs and has (un)install targets. git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/trunk@6843 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775
git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/trunk@6807 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775
git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/trunk@6694 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775