Added tests for wait(2) [currently failing] and getpid(2) [currently passing].

lib/libc/tests/sys/getpid.c

@@ -0,0 +1,11 @@
+#include <stdio.h>
+#include <unistd.h>
+
+int
+main(int argc, char **argv) {
+	pid_t pid;
+
+	pid = getpid();
+	printf("pid is %d\n", pid);
+	return 0;
+}

lib/libc/tests/sys/wait.c

@@ -0,0 +1,21 @@
+/*
+ * This program exhibits a problem with the wait(2) system call;
+ * If you do a wait and have no children, you will hang in the wait.
+ * The man page says that -1 should be returned and errno set to
+ * ECHILD.
+ *
+ * $Id: wait.c,v 1.1 1997/07/27 23:36:25 gdr Exp $
+ */
+
+#include <stdio.h>
+#include <sys/wait.h>
+
+int main (int argc, char **argv) {
+	union wait wstat;
+	int retval;
+
+	printf("starting wait\n");
+	retval = wait(&wstat);
+	printf("wait returned %d\n", retval);
+	return 0;
+}