fix and cleanup suseconds_t/timeval stuff (broken on 64-bit)

trash in the upper 32 bits was making the kernel sleep forever in
select on 64-bit systems.

include/sys/select.h

@@ -6,6 +6,7 @@ extern "C" {
 
 #define __NEED_size_t
 #define __NEED_time_t
+#define __NEED_suseconds_t
 #define __NEED_struct_timeval
 #define __NEED_struct_timespec
 #define __NEED_sigset_t

include/sys/time.h

@@ -4,17 +4,8 @@
 extern "C" {
 #endif
 
-/* All symbols from select.h except pselect are required anyway... */
 #include <sys/select.h>
 
-#define __NEED_time_t
-#define __NEED_suseconds_t
-#define __NEED_struct_timeval
-
-#include <bits/alltypes.h>
-
-
-
 int gettimeofday (struct timeval *, void *);
 
 #if defined(_XOPEN_SOURCE) || defined(_GNU_SOURCE)