Add missing endian swap functions for 64bits.

miner.h

@@ -173,7 +173,9 @@ static inline int fsync (int fd)
 # if __BYTE_ORDER == __LITTLE_ENDIAN
 #  define htole16(x) (x)
 #  define htole32(x) (x)
+#  define htole64(x) (x)
 #  define le32toh(x) (x)
+#  define le64toh(x) (x)
 #  define be32toh(x) bswap_32(x)
 #  define be64toh(x) bswap_64(x)
 #  define htobe32(x) bswap_32(x)
@@ -182,6 +184,8 @@ static inline int fsync (int fd)
 #  define htole16(x) bswap_16(x)
 #  define htole32(x) bswap_32(x)
 #  define le32toh(x) bswap_32(x)
+#  define le64toh(x) bswap_64(x)
+#  define htole64(x) bswap_64(x)
 #  define be32toh(x) (x)
 #  define be64toh(x) (x)
 #  define htobe32(x) (x)