[klibc] include: [sys/time.h] fix for Linux 3.5.1

From 3.5.1, <linux/time.h> does not even define FD_ZERO etc.

With Linux 3.5.1, 'make test' fails with:

  usr/klibc/tests/select.c: In function ‘main’:
  usr/klibc/tests/select.c:31:14: error: ‘FD_SETSIZE’ undeclared (first use in this function)
  usr/klibc/tests/select.c:31:14: note: each undeclared identifier is reported only once for each function it appears in

This is due to Linux commit 8ded2bbc1845e19c771eb55209aab166ef011243.
Handle it by making sure that FD_SETSIZE is defined.

Signed-off-by: Colin Watson <cjwatson@ubuntu.com>
Signed-off-by: maximilian attems <max@stro.at>
diff --git a/usr/include/sys/time.h b/usr/include/sys/time.h
index 7a2f8b9..98497e7 100644
--- a/usr/include/sys/time.h
+++ b/usr/include/sys/time.h
@@ -23,6 +23,7 @@
 #undef FD_SET
 #undef FD_CLR
 #undef FD_ISSET
+#undef FD_SETSIZE
 
 __extern void *memset(void *, int, size_t);
 static inline void FD_ZERO(fd_set *__fdsetp)
@@ -45,6 +46,8 @@
 		(__fd % BITS_PER_LONG)) & 1;
 }
 
+#define FD_SETSIZE __FD_SETSIZE
+
 __extern int gettimeofday(struct timeval *, struct timezone *);
 __extern int settimeofday(const struct timeval *, const struct timezone *);
 __extern int getitimer(int, struct itimerval *);