tests: fix test-util-sockets.c

Fixes following errors:
Running test test-util-sockets
ERROR test-util-sockets - missing test plan

# Start of name tests
**
ERROR:../tests/test-util-sockets.c:93:test_socket_fd_pass_name_good: assertion failed (fd != -1): (-1 != -1)
Bail out! ERROR:../tests/test-util-sockets.c:93:test_socket_fd_pass_name_good: assertion failed (fd != -1): (-1 != -1)

First should call to qemu_init_main_loop before socket_init,
then on win32 doesn't support for SOCKET_ADDRESS_TYPE_FD socket type

Signed-off-by: Yonggang Luo <luoyonggang@gmail.com>
Reviewed-by: Daniel P. Berrangé <berrange@redhat.com>
Message-Id: <20200915121318.247-21-luoyonggang@gmail.com>
Signed-off-by: Thomas Huth <thuth@redhat.com>

tests/test-util-sockets.c

@@ -75,7 +75,7 @@ int monitor_vprintf(Monitor *mon, const char *fmt, va_list ap) { abort(); }
 void monitor_init_qmp(Chardev *chr, bool pretty, Error **errp) {}
 void monitor_init_hmp(Chardev *chr, bool use_readline, Error **errp) {}
 
-
+#ifndef _WIN32
 static void test_socket_fd_pass_name_good(void)
 {
     SocketAddress addr;
@@ -227,6 +227,7 @@ static void test_socket_fd_pass_num_nocli(void)
 
     g_free(addr.u.fd.str);
 }
+#endif
 
 #ifdef __linux__
 static gchar *abstract_sock_name;
@@ -321,6 +322,7 @@ int main(int argc, char **argv)
 {
     bool has_ipv4, has_ipv6;
 
+    qemu_init_main_loop(&error_abort);
     socket_init();
 
     g_test_init(&argc, &argv, NULL);
@@ -340,6 +342,7 @@ int main(int argc, char **argv)
                         test_fd_is_socket_bad);
         g_test_add_func("/util/socket/is-socket/good",
                         test_fd_is_socket_good);
+#ifndef _WIN32
         g_test_add_func("/socket/fd-pass/name/good",
                         test_socket_fd_pass_name_good);
         g_test_add_func("/socket/fd-pass/name/bad",
@@ -352,6 +355,7 @@ int main(int argc, char **argv)
                         test_socket_fd_pass_num_bad);
         g_test_add_func("/socket/fd-pass/num/nocli",
                         test_socket_fd_pass_num_nocli);
+#endif
     }
 
 #ifdef __linux__