* gnulib-tool (func_get_automake_snippet_unconditional): To be able to
not distribute top/README-release by default, don't distribute files
from top/ unconditionally.
* modules/gnumakefile (Makefile.am): Distribute top/GNUmakefile.
* modules/maintainer-makefile (Makefile.am): Distribute top/maint.mk.
* modules/gnumakefile [Makefile.am]: The makefiles generated by
Automake-NG always contain a definition of VPATH, even in non-VPATH
builds (its value being simply '.' in that case). So, in the
'clean-GNUmakefile' rule, to determine whether running under a
VPATH setup, compare '$(srcdir)' to '.' rather than checking whether
'$(VPATH)' expands to the empty string.
* modules/gnumakefile (clean-GNUmakefile): Also, use
test ... && ... || : syntax rather than if-then ... fi.
Signed-off-by: Jim Meyering <meyering@redhat.com>