[RFC patch] Documenation: don't build media .rst files when not building Documentation/media/

Don't build media .rst files from header files when Documentation/media/ is not in the target SPHINXDIRS. It looks like the dependencies in Documentation/media/Makefile should take care of running parse-headers.pl to generated .rst files from the header files, but it's not happening and I don't

[RFC patch] Documenation: don't build media .rst files when not building Documentation/media/

Don't build media .rst files from header files when Documentation/media/ is not in the target SPHINXDIRS. It looks like the dependencies in Documentation/media/Makefile should take care of running parse-headers.pl to generated .rst files from the header files, but it's not happening and I don't