* Makefile.in (src/paths.h): Edit the `infodir' variable into this

* Makefile.in (src/paths.h): Edit the `infodir' variable into this
	too, as the value of the PATH_INFO macro.

	* Makefile.in (install): Split this into `install' and
	`do-install', to give people more control over exactly what gets
	done.
	(do-install): New target, containing the guts of `install'.  Don't
	remove and recreate the directories inside the copying loop - do
	it all before the copying loop.  Pass more flags to the lib-src
	make.
	(mkdir): Create ${infodir}, ${mandir}, and ${sitelispdir} here, to
	avoid errors and warnings.