Fix incorrect check for iPhone macro in hwconsts.h
TARGET_OS_IPHONE is always defined when building on Mac OS, so the define was wrong. This macro expands to either 0 or 1, so a simple #if should be enough.
//
// Prefix header for all source files of the 'CocoaTouchStaticLibrary' target in the 'CocoaTouchStaticLibrary' project.
//
#ifdef __OBJC__
#import <Foundation/Foundation.h>
#endif