examples/thttpd: align to elf/posix_spawn exmaples to fix depend build warning
Build warning logs as below:
arm-none-eabi-gcc: warning: ./hello/Makefile: linker input file unused because linking not done
@@ -62,9 +62,6 @@ build:
context::
+$(Q) $(CONTENT_MAKE) context TOPDIR="$(TOPDIR)" APPDIR="$(APPDIR)" CROSSDEV=$(CROSSDEV)
-depend::
- +$(Q) $(CONTENT_MAKE) depend TOPDIR="$(TOPDIR)" APPDIR="$(APPDIR)" CROSSDEV=$(CROSSDEV)
-
clean::
+$(Q) $(CONTENT_MAKE) clean TOPDIR="$(TOPDIR)" APPDIR="$(APPDIR)" CROSSDEV=$(CROSSDEV)
