Fix renameat2 configure check

Give this a chance to ever succeed by not using undefined variables in
the test code.

Found by a KDE unit test observing changes in inotify behavior between
Qt5 and Qt6.

Change-Id: Iceb743d88dfa093c02d76ce32ea5c8ced24bfc5b
Reviewed-by: Thiago Macieira <thiago.macieira@intel.com>
(cherry picked from commit 193039dff343139de4a83b7811c11927be63a4ed)

src/corelib/configure.cmake

@@ -435,7 +435,7 @@ qt_config_compile_test(renameat2
 #include <fcntl.h>
 #include <stdio.h>
 
-int main(void)
+int main(int, char **argv)
 {
     /* BEGIN TEST: */
 renameat2(AT_FDCWD, argv[1], AT_FDCWD, argv[2], RENAME_NOREPLACE | RENAME_WHITEOUT);