test_bridge: Clean up memory before exit

Cleaning up memory makes the test pass valgrind's leak-check.

Signed-off-by: Andrew Jeffery <andrew@aj.id.au>
Change-Id: I72d34315cd1a46183420c0548e7d7bbfabebc44b
diff --git a/tests/test_bridge.c b/tests/test_bridge.c
index 4728b28..1a2fc38 100644
--- a/tests/test_bridge.c
+++ b/tests/test_bridge.c
@@ -99,5 +99,9 @@
 	assert(ctx->bindings[0]->tx_count == 1);
 	assert(ctx->bindings[0]->last_pkt_data == 0x55);
 
+	__mctp_free(ctx->bindings[1]);
+	__mctp_free(ctx->bindings[0]);
+	mctp_destroy(ctx->mctp);
+
 	return EXIT_SUCCESS;
 }