Add prototype for prctl to fix 64 bit build break

Change-Id: I1cda84a412666d5123be274ee0be399d25d86164
diff --git a/sshd.c b/sshd.c
index 9fcecea..dd76f8e 100644
--- a/sshd.c
+++ b/sshd.c
@@ -1579,7 +1579,9 @@
 			xfree(privsep_pw->pw_passwd);
 		privsep_pw->pw_passwd = xstrdup("*");
 	}
+#ifndef ANDROID
 	endpwent();
+#endif
 
 	/* load private host keys */
 	sensitive_data.host_keys = xcalloc(options.num_host_key_files,