stat.2: DESCRIPTION: add list entries for 'st_uid' and 'st_gid'

Signed-off-by: Michael Kerrisk <mtk.manpages@gmail.com>
diff --git a/man2/stat.2 b/man2/stat.2
index 915ef63..1d2eea5 100644
--- a/man2/stat.2
+++ b/man2/stat.2
@@ -221,6 +221,12 @@
 .I st_nlink
 This field contains the number of hard links to the file.
 .TP
+.I st_uid
+This field contains the user ID of the owner of the file.
+.TP
+.I st_gid
+This field contains the ID of the group owner of the file.
+.TP
 .I st_rdev
 This field describes the device that this file (inode) represents.
 .TP