selinux: remove auditallow on toolbox_exec

Clean up log spam. netmgrd makes calls to toolbox_exec:

avc: granted { read open } for comm="sh" path="/system/bin/toybox" dev="dm-0" ino=397 scontext=u:r:netmgrd:s0 tcontext=u:object_r:toolbox_exec:s0 tclass=file

Change-Id: Ib7733a9cae65066432e1f5b15e39eadf81da94f1
1 file changed