Fix missing declaration of __bswap64 in endian.h
Merges
@@ -86,6 +86,7 @@ typedef __uint64_t uint64_t;
#if 1 //BYTE_ORDER == _LITTLE_ENDIAN
#define __bswap16 __bswap_16
#define __bswap32 __bswap_32
+#define __bswap64 __bswap_64
#define htobe16(x) bswap16((x))
#define htobe32(x) bswap32((x))
#define htobe64(x) bswap64((x))
