io: bind to loopback IP addrs in test suite

The test suite currently binds to 0.0.0.0 or ::, which covers
all interfaces of the machine. It is bad practice for test
suite to open publically accessible ports on a machine, so
switch to use loopback addrs 127.0.0.1 or ::1.

Reported-by: Peter Maydell <peter.maydell@linaro.org>
Reviewed-by: Eric Blake <eblake@redhat.com>
Signed-off-by: Daniel P. Berrange <berrange@redhat.com>

tests/test-io-channel-socket.c

@@ -261,7 +261,7 @@ static void test_io_channel_ipv4(bool async)
 
     listen_addr->type = SOCKET_ADDRESS_KIND_INET;
     listen_addr->u.inet = g_new0(InetSocketAddress, 1);
-    listen_addr->u.inet->host = g_strdup("0.0.0.0");
+    listen_addr->u.inet->host = g_strdup("127.0.0.1");
     listen_addr->u.inet->port = NULL; /* Auto-select */
 
     connect_addr->type = SOCKET_ADDRESS_KIND_INET;
@@ -295,7 +295,7 @@ static void test_io_channel_ipv6(bool async)
 
     listen_addr->type = SOCKET_ADDRESS_KIND_INET;
     listen_addr->u.inet = g_new0(InetSocketAddress, 1);
-    listen_addr->u.inet->host = g_strdup("::");
+    listen_addr->u.inet->host = g_strdup("::1");
     listen_addr->u.inet->port = NULL; /* Auto-select */
 
     connect_addr->type = SOCKET_ADDRESS_KIND_INET;