Make wpa_supplicant enforcing.

Change-Id: Idc26aadd0add9f39447d51a1d82a55a957a88e9a
Signed-off-by: Stephen Smalley <sds@tycho.nsa.gov>

wpa_supplicant.te

 # wpa - wpa supplicant or equivalent
 type wpa, domain;
-permissive_or_unconfined(wpa)
 type wpa_exec, exec_type, file_type;
 
 init_daemon_domain(wpa)