Makefile: add python script dependency for meson-buildoptions.sh

If we update the script we should also make sure we regenerate the
help text.

Reviewed-by: Paolo Bonzini <pbonzini@redhat.com>
Message-ID: <20260203115201.2387721-3-alex.bennee@linaro.org>
Signed-off-by: Alex Bennée <alex.bennee@linaro.org>

Makefile

@@ -130,7 +130,7 @@ Makefile.mtest: build.ninja scripts/mtest2make.py
 
 .PHONY: update-buildoptions
 all update-buildoptions: $(SRC_PATH)/scripts/meson-buildoptions.sh
-$(SRC_PATH)/scripts/meson-buildoptions.sh: $(SRC_PATH)/meson_options.txt
+$(SRC_PATH)/scripts/meson-buildoptions.sh: $(SRC_PATH)/meson_options.txt $(SRC_PATH)/scripts/meson-buildoptions.py
 	$(MESON) introspect --buildoptions $(SRC_PATH)/meson.build | $(PYTHON) \
 	  scripts/meson-buildoptions.py > $@.tmp && mv $@.tmp $@
 endif