gh-108765: Python.h no longer includes <sys/time.h> (#108775)

Python.h no longer includes <time.h>, <sys/select.h> and <sys/time.h>
standard header files.

* Add <time.h> include to xxsubtype.c.
* Add <sys/time.h> include to posixmodule.c and semaphore.c.
* readline.c includes <sys/select.h> instead of <sys/time.h>.
* resource.c no longer includes <time.h> and <sys/time.h>.

Modules/_multiprocessing/semaphore.c

@@ -9,6 +9,10 @@
 
 #include "multiprocessing.h"
 
+#ifdef HAVE_SYS_TIME_H
+#  include <sys/time.h>           // gettimeofday()
+#endif
+
 #ifdef HAVE_MP_SEMAPHORE
 
 enum { RECURSIVE_MUTEX, SEMAPHORE };