selftests: vDSO: vdso_test_gettimeofday: Make compatible with nolibc

nolibc does not provide sys/time.h and sys/auxv.h,
instead their definitions are available unconditionally.

Guard the includes so they are not attempted on nolibc.

Signed-off-by: Thomas Weißschuh <thomas.weissschuh@linutronix.de>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Reviewed-by: Vincenzo Frascino <vincenzo.frascino@arm.com>
Acked-by: Shuah Khan <skhan@linuxfoundation.org>
Link: https://lore.kernel.org/all/20250226-parse_vdso-nolibc-v2-15-28e14e031ed8@linutronix.de

Author: t-8ch

tools/testing/selftests/vDSO/vdso_test_gettimeofday.c

@@ -11,8 +11,10 @@
  */
 
 #include <stdio.h>
+#ifndef NOLIBC
 #include <sys/auxv.h>
 #include <sys/time.h>
+#endif
 
 #include "../kselftest.h"
 #include "parse_vdso.h"