Fix typo in types.conf on aarch64-linux

It was introduced by using the diff in #1066, but for some reason there was some garbage there.
This is newly generated by "rake types_conf" on Debian on aarch64/v8.

lib/ffi/platform/aarch64-linux/types.conf

@@ -109,7 +109,7 @@ rbx.platform.typedef.fsfilcnt_t = ulong
 rbx.platform.typedef.gid_t = uint
 rbx.platform.typedef.id_t = uint
 rbx.platform.typedef.in_addr_t = uint
-rbx.platform.typedef.in_port_t = ushortin the machine
+rbx.platform.typedef.in_port_t = ushort
 rbx.platform.typedef.ino_t = ulong
 rbx.platform.typedef.int16_t = short
 rbx.platform.typedef.int32_t = int