Add missing endian swap functions for 64bits.
diff --git a/miner.h b/miner.h
index 2396f1b..c5446b5 100644
--- a/miner.h
+++ b/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)