Description of problem:
In enforcing mode gdmsetup can't write to gdm.conf.

Version-Release number of selected component (if applicable):
gdm-2.6.0.0-2
policy-1.9.2-10

How reproducible:
100%

Steps to Reproduce:
1. Clean install.
2. Log in as root.
3. System Settings->Login Screen
4. Change the graphical greeter style.
5. Close.
6. Log out: style has not changed.
  
Actual results:
audit(1081174438.586:0): avc:  denied  { write } for  pid=3984
exe=/usr/sbin/gdmsetup name=gdm.conf dev=hda2 ino=3836056
scontext=root:staff_r:staff_t tcontext=system_u:object_r:etc_t tclass=file
audit(1081174438.586:0): avc:  denied  { read } for  pid=3984
exe=/usr/sbin/gdmsetup name=gdm.pid dev=hda2 ino=1017147
scontext=root:staff_r:staff_t tcontext=system_u:object_r:xdm_var_run_t
tclass=file

audit2allow says:
allow staff_t etc_t:file { write };
allow staff_t xdm_var_run_t:file { read };