[macosx] Add support for SDK 10.8 and 10.9.

This was required to fix a broken build caused
by not having SDK 10.7 or earlier.



git-svn-id: http://subversion.assembla.com/svn/portaudio/portaudio/trunk@1914 0f58301d-fd10-0410-b4af-bbb618454e57
[tests] Add EOL to patest_mono.c

Build was failing on Mac because of the missing end-of-line.



git-svn-id: http://subversion.assembla.com/svn/portaudio/portaudio/trunk@1915 0f58301d-fd10-0410-b4af-bbb618454e57