sim: cris: fix C tests with newer toolchains

Make sure we include unistd.h for getpid prototypes to fix build
warnings/errors with newer compilers & C libraries.

Doing that for close in openpf highlights these were using the
wrong function -- need to use fclose on FILE*, not close.

These tests pass again with a cris-elf toolchain.

sim/testsuite/sim/cris/ChangeLog

@@ -1,3 +1,11 @@
+2021-01-07  Mike Frysinger  <vapier@gentoo.org>
+
+	* kill2.c: Include unistd.h.
+	* pipe1.c, sched1.c, sched2.c, sched3.c, sched4.c, sig5.c,
+	sig8.c: Likewise.
+	* openpf1.c (main): Change close to fclose.
+	* openpf2.c: Likewise.
+
 2016-01-04  Mike Frysinger  <vapier@gentoo.org>
 
 	* asm/opterr1.ms: Update expected output.

sim/testsuite/sim/cris/c/kill2.c

@@ -7,6 +7,8 @@
 #include <stdlib.h>
 #include <sys/types.h>
 #include <signal.h>
+#include <unistd.h>
+
 int
 main (void)
 {

sim/testsuite/sim/cris/c/openpf1.c

@@ -27,7 +27,7 @@ int main (int argc, char *argv[])
   f = fopen (fnam, "rb");
   if (f == NULL)
     abort ();
-  close (f);
+  fclose (f);
 
   /* Cover another execution path.  */
   if (fopen ("/nonexistent", "rb") != NULL

sim/testsuite/sim/cris/c/openpf2.c

@@ -10,7 +10,7 @@ int main (int argc, char *argv[])
   FILE *f = fopen ("openpf2.c", "rb");
   if (f == NULL)
     abort ();
-  close (f);
+  fclose (f);
   printf ("pass\n");
   return 0;
 }

sim/testsuite/sim/cris/c/pipe1.c

@@ -11,6 +11,7 @@
 #include <sys/types.h>
 #include <sys/wait.h>
 #include <limits.h>
+#include <unistd.h>
 
 int main (void)
 {

sim/testsuite/sim/cris/c/sched1.c

@@ -5,6 +5,7 @@
 #include <sched.h>
 #include <stdio.h>
 #include <stdlib.h>
+#include <unistd.h>
 
 int main (void)
 {

sim/testsuite/sim/cris/c/sched2.c

@@ -6,6 +6,7 @@
 #include <stdio.h>
 #include <stdlib.h>
 #include <string.h>
+#include <unistd.h>
 
 int main (void)
 {

sim/testsuite/sim/cris/c/sched3.c

@@ -6,6 +6,7 @@
 #include <stdio.h>
 #include <errno.h>
 #include <stdlib.h>
+#include <unistd.h>
 
 int main (void)
 {

sim/testsuite/sim/cris/c/sched4.c

@@ -6,6 +6,7 @@
 #include <stdio.h>
 #include <errno.h>
 #include <stdlib.h>
+#include <unistd.h>
 
 int main (void)
 {

sim/testsuite/sim/cris/c/sig5.c

@@ -8,6 +8,8 @@
 #include <stdio.h>
 #include <sys/types.h>
 #include <signal.h>
+#include <unistd.h>
+
 int main (void)
 {
   kill (getpid (), SIGBUS);

sim/testsuite/sim/cris/c/sig8.c

@@ -10,6 +10,8 @@
 #include <stdio.h>
 #include <sys/types.h>
 #include <signal.h>
+#include <unistd.h>
+
 int main (void)
 {
   signal (SIGALRM, SIG_IGN);