nrf52832: fix assemble rule
Make sure the output directory exists
before writing files to it.
@@ -172,7 +172,7 @@ vpath %.s $(ASM_PATHS)
CONTIKI_OBJECTFILES += $(ASM_OBJECTS) $(NRF52_SDK_ROOT)/components/iot/ble_6lowpan/lib/ble_6lowpan.a
# Assemble files
-$(OBJECT_DIRECTORY)/%.o: %.s
+$(OBJECT_DIRECTORY)/%.o: %.s | $(DEPDIR)
$(TRACE_CC)
$(Q)$(CCACHE) $(CC) $(ASMFLAGS) $(addprefix -I$(NRF52_SDK_ROOT)/, $(INC_PATHS)) -c -o $@ $<
