Lion no longer includes wxWidgets 2.8, so be prepared to fall back to
Externals/wxWidgets3 even when no wx-config command is found at all.
There are a few new and deprecated symbols in the 10.7 SDK that
conflict with wxWidgets/Dolphin, so just use the 10.6 SDK for now.
git-svn-id: https://dolphin-emu.googlecode.com/svn/trunk@7325 8ced0084-cf51-0410-be5f-012b33b47a6e