Added SDL2 support to cmake script

git-svn-id: svn+ssh://svn.code.sf.net/p/yabause/code/trunk@3255 d7be59e3-070e-4b9a-85a1-4646befae34d
Fixed function name in signal binding.

git-svn-id: svn+ssh://svn.code.sf.net/p/yabause/code/trunk@3256 d7be59e3-070e-4b9a-85a1-4646befae34d
Merge https://github.com/Guillaumito/yabause