Add proper DynASM dependency.

src/Makefile

@@ -622,7 +622,7 @@ $(MINILUA_T): $(MINILUA_O)
 	$(E) "HOSTLINK  $@"
 	$(Q)$(HOST_CC) $(HOST_ALDFLAGS) -o $@ $(MINILUA_O) $(MINILUA_LIBS) $(HOST_ALIBS)
 
-host/buildvm_arch.h: $(DASM_DASC) $(DASM_DEP)
+host/buildvm_arch.h: $(DASM_DASC) $(DASM_DEP) $(DASM_DIR)/*.lua
 	$(E) "DYNASM    $@"
 	$(Q)$(DASM) $(DASM_FLAGS) -o $@ $(DASM_DASC)