selftests: fib rule: Make 'getmatch' and 'match' local variables

Let's restrict the scope of these variables to avoid possible
interferences.

Signed-off-by: Guillaume Nault <gnault@redhat.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

tools/testing/selftests/net/fib_rule_tests.sh

@@ -115,6 +115,9 @@ fib_rule6_test_match_n_redirect()
 
 fib_rule6_test()
 {
+	local getmatch
+	local match
+
 	# setup the fib rule redirect route
 	$IP -6 route add table $RTABLE default via $GW_IP6 dev $DEV onlink
 
@@ -184,6 +187,9 @@ fib_rule4_test_match_n_redirect()
 
 fib_rule4_test()
 {
+	local getmatch
+	local match
+
 	# setup the fib rule redirect route
 	$IP route add table $RTABLE default via $GW_IP4 dev $DEV onlink