esp32/Makefile: Make sure that directory exists for sdkconfig.h.
@@ -234,6 +234,7 @@ SRC_QSTR_AUTO_DEPS +=
$(SDKCONFIG_H): $(SDKCONFIG)
$(ECHO) "GEN $@"
+ $(Q)$(MKDIR) -p $(dir $@)
$(Q)$(PYTHON) $(ESPIDF)/tools/kconfig_new/confgen.py \
--output header $@ \
--config $< \
