Add missing permissions for dovecot-{imap,lmtp,pop3}

References: https://bugzilla.opensuse.org/show_bug.cgi?id=1199535

profiles/apparmor.d/usr.lib.dovecot.imap

@@ -35,6 +35,7 @@ profile dovecot-imap /usr/lib/dovecot/imap {
 
   owner /tmp/dovecot.imap.* rw,
   @{PROC}/@{pid}/attr/{apparmor/,}current rw,
+  @{PROC}/@{pid}/stat r,
   /usr/bin/doveconf rix,
   /usr/lib/dovecot/imap mrix,
   /usr/share/dovecot/** r,

profiles/apparmor.d/usr.lib.dovecot.lmtp

@@ -31,6 +31,8 @@ profile dovecot-lmtp /usr/lib/dovecot/lmtp {
 
   @{HOME}/.dovecot.svbin r,
   @{PROC}/@{pid}/attr/{apparmor/,}current rw,
+  owner @{PROC}/@{pid}/io r,
+  owner @{PROC}/@{pid}/stat r,
   @{PROC}/*/mounts r,
   /tmp/dovecot.lmtp.* rw,
   /usr/lib/dovecot/lmtp mr,

profiles/apparmor.d/usr.lib.dovecot.pop3

@@ -26,6 +26,7 @@ profile dovecot-pop3 /usr/lib/dovecot/pop3 {
   @{DOVECOT_MAILSTORE}/** rwkl,
 
   @{HOME} r, # ???
+  @{PROC}/@{pid}/stat r,
   /usr/lib/dovecot/pop3 mr,
 
   # Site-specific additions and overrides. See local/README for details.