Add osx variant for int64_t and uint64_t.
typedef signed char int8_t;
typedef short int int16_t;
typedef int int32_t;
+#ifdef __APPLE__
+typedef long long int int64_t;
+#else
typedef long int int64_t;
+#endif
typedef unsigned char uint8_t;
typedef unsigned short int uint16_t;
typedef unsigned int uint32_t;
+#ifdef __APPLE__
+typedef unsigned long long int uint64_t;
+#else
typedef unsigned long int uint64_t;
+#endif
typedef signed char int_least8_t;
typedef short int int_least16_t;
