fix lock group

It was missing from gshadow.

Fixes FS#30365.

PKGBUILD

@@ -2,7 +2,7 @@
 
 pkgname=filesystem
 pkgver=2012.6
-pkgrel=3
+pkgrel=4
 pkgdesc='Base filesystem'
 arch=('any')
 license=('GPL')
@@ -90,6 +90,6 @@ md5sums=('45940618da782cc391c59f88ab3333c3'
          'c4534d6c59d75be0eb99ddaafcf93198'
          '6f48288b6fcaf0065fcb7b0e525413e0'
          '22518e922891f9359f971f4f5b4e793c'
-         'd2dc4e39dbdea75b107f91789e3274ab'
+         'f95416882cef800edef08382a1176b7d'
          'f3b6ae7db8adffaaa4bffc6099dcbd50'
          'a8a962370cd0128465d514e6a1f74130')

gshadow

@@ -19,6 +19,7 @@ rfkill:x::
 smmsp:::
 http:::
 games:::
+lock:::
 network:x::
 video:x::
 audio:::