* 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/mmaptest03.c

@@ -8,6 +8,7 @@
 #include <sys/mman.h>
 #include <sys/wait.h>
 #include <errno.h>
+#include <string.h>
 
 /* - Checks if mapping of already closed file survives fork()
    - Checks if mapping the same region of the same file twice
@@ -21,7 +22,7 @@ jmp_buf r;
 char const line[] = "y1 y1 y1 y1 y1 y1 y1 y1 y1 y1 y1 y1 y1 y1 y1 y1 y1";
 
 void
-perror_exit (char *str)
+perror_exit (const char *str)
 {    
   printf ("%s: %s\n", str, strerror (errno));
   exit (1);
@@ -37,7 +38,7 @@ sigsegv (int unused)
 int
 main(int argc, char **argv)
 {
-  int i, fd, status;
+  int fd, status;
   struct stat statbuf;
   char c, *buf1, *buf2;
   pid_t pid;