stmhal: add order-only dependency on build directory

Signed-off-by: Sven Wegener <sven.wegener@stealer.net>

stmhal/Makefile

@@ -336,15 +336,15 @@ CMSIS_MCU_HDR = cmsis/devinc/$(CMSIS_MCU_LOWER).h
 $(BUILD)/modstm.o: $(GEN_STMCONST_HDR)
 # Use a pattern rule here so that make will only call make-stmconst.py once to
 # make both modstm_const.h and modstm_qstr.h
-$(HEADER_BUILD)/%_const.h $(BUILD)/%_qstr.h: $(CMSIS_MCU_HDR) make-stmconst.py
+$(HEADER_BUILD)/%_const.h $(BUILD)/%_qstr.h: $(CMSIS_MCU_HDR) make-stmconst.py | $(HEADER_BUILD)
 	$(ECHO) "Create stmconst $@"
 	$(Q)$(PYTHON) make-stmconst.py --qstr $(GEN_STMCONST_QSTR) $(CMSIS_MCU_HDR) > $(GEN_STMCONST_HDR)
 
-$(GEN_CDCINF_HEADER): $(GEN_CDCINF_FILE) $(FILE2H)
+$(GEN_CDCINF_HEADER): $(GEN_CDCINF_FILE) $(FILE2H) | $(HEADER_BUILD)
 	$(ECHO) "Create $@"
 	$(Q)$(PYTHON) $(FILE2H) $< > $@
 
-$(GEN_CDCINF_FILE): $(CDCINF_TEMPLATE) $(INSERT_USB_IDS) $(USB_IDS_FILE)
+$(GEN_CDCINF_FILE): $(CDCINF_TEMPLATE) $(INSERT_USB_IDS) $(USB_IDS_FILE) | $(HEADER_BUILD)
 	$(ECHO) "Create $@"
 	$(Q)$(PYTHON) $(INSERT_USB_IDS) $(USB_IDS_FILE) $< > $@