* libltp/include/test.h: Fix C warnings.

* winsup.api/checksignal.c: Ditto.
* winsup.api/crlf.c: Ditto.
* winsup.api/devzero.c: Ditto.
* winsup.api/iospeed.c: Ditto.
* winsup.api/mmaptest01.c: Ditto.
* winsup.api/mmaptest02.c: Ditto.
* winsup.api/mmaptest03.c: Ditto.
* winsup.api/mmaptest04.c: Ditto.
* winsup.api/nullgetcwd.c: Ditto.
* winsup.api/sigchld.c: Ditto.
* winsup.api/signal-into-win32-api.c: Ditto.
* winsup.api/systemcall.c: Ditto.
* winsup.api/waitpid.c: Ditto.
* winsup.api/pthread/mainthreadexits.c: Ditto.
* winsup.api/pthread/test.h: Ditto.
* winsup.api/pthread/threadidafterfork.c: Ditto.
* Makefile.in: Remove cygrun.exe from RUNTIME since it is built here now.

winsup/testsuite/winsup.api/mmaptest02.c

@@ -7,6 +7,7 @@
 #include <stdlib.h>
 #include <stdio.h>
 #include <errno.h>
+#include <string.h>
 
 sigset_t unblock_sigsegv;
 jmp_buf r;
@@ -27,7 +28,7 @@ int fd;
 */
 
 void
-perror_exit (char *str, int code)
+perror_exit (const char *str, int code)
 {
   printf ("%s: %s\n", str, strerror (errno));
   exit (code);