virt-aa-helper: Actually fix AppArmor profile

Tried previously in

  commit b1eb8b3e
  Author: Andrea Bolognani <abologna@redhat.com>
  Date:   Mon Aug 19 10:23:42 2019 +0200

    virt-aa-helper: Fix AppArmor profile

  v5.6.0-243-gb1eb8b3e

with somewhat disappointing results.
Signed-off-by: NAndrea Bolognani <abologna@redhat.com>
Reviewed-by: NJán Tomko <jtomko@redhat.com>

src/security/apparmor/usr.lib.libvirt.virt-aa-helper

@@ -18,8 +18,8 @@ profile virt-aa-helper /usr/{lib,lib64}/libvirt/virt-aa-helper {
   @{PROC}/filesystems r,
 
   # Used when internally running another command (namely apparmor_parser)
-  @{PROC}/self/fd r,
-  @{PROC}/@{pid}/fd r,
+  @{PROC}/self/fd/ r,
+  @{PROC}/@{pid}/fd/ r,
 
   /etc/libnl-3/classid r,