Add ANDROID_API macro to export symbols

#   define CC_UNLIKELY( exp )  (__builtin_expect( !!(exp), 0 ))

#endif

/**

 * exports marked symbols

 *

 * if used on a C++ class declaration, this macro must be inserted

 * after the "class" keyword. For instance:

 *

 * template <typename TYPE>

 * class ANDROID_API Singleton { }

 */

#define ANDROID_API __attribute__((visibility("default")))

#endif // ANDROID_CUTILS_COMPILER_H