xz: Fix the Capsicum rights on user_abort_pipe.

src/xz/file_io.c

diff --git a/src/xz/file_io.c b/src/xz/file_io.c
index 308fa1d..8a5e045 100644
--- a/src/xz/file_io.c
+++ b/src/xz/file_io.c
@@ -195,8 +195,12 @@
 			CAP_WRITE, CAP_SEEK)))
 		goto error;
 
+	if (cap_rights_limit(user_abort_pipe[0], cap_rights_init(&rights,
+			CAP_EVENT)))
+		goto error;
+
 	if (cap_rights_limit(user_abort_pipe[1], cap_rights_init(&rights,
-			CAP_EVENT, CAP_WRITE)))
+			CAP_WRITE)))
 		goto error;
 
 	if (cap_enter())