doc: Makefile: publish pdf and epub versions too

Copy the generated files in the special _static directory.

Fixes [YOCTO #14357]

(From yocto-docs rev: b60c5b86eaef5ddab026837e0952a28c7948bc2d)

Signed-off-by: Michael Opdenacker <michael.opdenacker@bootlin.com>
Signed-off-by: Antonin Godard <antonin.godard@bootlin.com>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>

documentation/Makefile

@@ -26,10 +26,12 @@ help:
 
 .PHONY: all help Makefile clean stylecheck publish epub latexpdf
 
-publish: Makefile html singlehtml
+publish: Makefile epub latexpdf html singlehtml
 	rm -rf $(BUILDDIR)/$(DESTDIR)/
 	mkdir -p $(BUILDDIR)/$(DESTDIR)/
 	cp -r $(BUILDDIR)/html/* $(BUILDDIR)/$(DESTDIR)/
+	mkdir -p $(BUILDDIR)/$(DESTDIR)/_static
+	cp $(BUILDDIR)/epub/TheYoctoProject.epub $(BUILDDIR)/latex/theyoctoproject.pdf $(BUILDDIR)/$(DESTDIR)/_static/
 	cp $(BUILDDIR)/singlehtml/index.html $(BUILDDIR)/$(DESTDIR)/singleindex.html
 	sed -i -e 's@index.html#@singleindex.html#@g' $(BUILDDIR)/$(DESTDIR)/singleindex.html