Fix iOS/macOS build with current SDKs.

Use <sys/types.h> not <inttypes.h> when building for Apple platforms,
as it works with modular dynamic-framework builds.
Signed-off-by: Ralph Giles <giles@thaumas.net>

include/ogg/os_types.h

@@ -70,7 +70,7 @@
 
 #elif (defined(__APPLE__) && defined(__MACH__)) /* MacOS X Framework build */
 
-#  include <inttypes.h>
+#  include <sys/types.h>
    typedef int16_t ogg_int16_t;
    typedef uint16_t ogg_uint16_t;
    typedef int32_t ogg_int32_t;