fix makefiles etc for subdirs

examples/ex4.c

@@ -1,9 +1,10 @@
 #!./tcc -run -L/usr/X11R6/lib -lX11
 #include <stdlib.h>
-/* Yes, TCC can use X11 too ! */
 #include <stdio.h>
 #include <X11/Xlib.h>
 
+/* Yes, TCC can use X11 too ! */
+
 int main(int argc, char **argv)
 {
     Display *display;
@@ -16,8 +17,8 @@ int main(int argc, char **argv)
     }
     printf("X11 display opened.\n");
     screen = XScreenOfDisplay(display, 0);
-    printf("width = %d\nheight = %d\ndepth = %d\n", 
-           screen->width, 
+    printf("width = %d\nheight = %d\ndepth = %d\n",
+           screen->width,
            screen->height,
            screen->root_depth);
     XCloseDisplay(display);