OK, here's the issue with ADL_SDK and cgminer on os x:
- the adl_sdk.h uses __stdcall which isn't supported with clang on os x, removing that fixes compilation

HOWEVER, once it compiles you will get link errors because the AMD libs/driver for OS X simply don't have the required ADL layer compiled in... so no use trying.

Also "-mnative" is a bogus flag, don't use it.