Require /bin/getfacl and /bin/setfacl when running the acl tests

For cases where these utilities aren't installed, the tests would fail today
in a non-intuitive manner on sub-testcase #3 in each of the test scripts

MFC after: 1 week
Reviewed by: markj
Sponsored by: EMC / Isilon Storage Division

tests/sys/acl/Makefile

@@ -22,8 +22,14 @@ TAP_TESTS_SH+=	04
 TEST_METADATA.$t+=	required_user="root"
 .endfor
 
+_ACL_PROGS=		/bin/getfacl /bin/setfacl
+
 .for t in 01 03 04
-TEST_METADATA.$t+=	required_programs="/sbin/zpool"
+TEST_METADATA.$t+=	required_programs="/sbin/zpool ${_ACL_PROGS}"
+.endfor
+
+.for t in 00 02
+TEST_METADATA.$t+=	required_programs="${_ACL_PROGS}"
 .endfor
 
 .include <bsd.test.mk>