Fix build for branches without tags

Fix build for branches without tags

	* autogen.sh (emacs_is_beta): Correct the text for branches
	without the release tags...

	* lib-src/make-dump-id.c: Include the config.h from the proper
	directory. This was not an issue for a long time, since there was
	always a tag when under git control. make-dump-id was only
	compiled then. Now in autogen.sh we will always make sure there is
	a tree version, so this will no longer be an issue again.

Signed-off-by: Nelson Ferreira <nelson.ferreira@ieee.org>