Move archtypes.h, fpu.h, and stackframe.h

Move archtypes.h to include/ dir, since several servers require it. Move
fpu.h and stackframe.h to arch-specific header directory. Make source
files and makefiles aware of the new header locations.

kernel/glo.h

@@ -12,7 +12,8 @@
 #endif
 
 #include <minix/config.h>
-#include <archtypes.h>
+#include <machine/archtypes.h>
+#include "archconst.h"
 #include "config.h"
 #include "debug.h"