clear, watch: use 0x1b instead of non-standard \e

Signed-off-by: Hiltjo Posthuma <hiltjo@codemadness.org>

clear.c

@@ -5,6 +5,6 @@
 int
 main(void)
 {
-	printf("\e[2J\e[H");
+	printf("\x1b[2J\x1b[H");
 	return EXIT_SUCCESS;
 }

watch.c

@@ -38,7 +38,7 @@ main(int argc, char *argv[])
 	}
 
 	for (;;) {
-		printf("\e[2J\e[H");
+		printf("\x1b[2J\x1b[H"); /* clear */
 		fflush(NULL);
 		system(cmd);
 		sleep(interval);