Tag 3.0.0-rc2 release

git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/tags/WX_3_0_0-rc2@75083 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775
Tag 3.0.0-rc2 release again.

git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/tags/WX_3_0_0-rc2@75085 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775
Tag 3.0.0-rc2 release yet again.

git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/tags/WX_3_0_0-rc2@75087 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775