module-deps.pl: extend dependency graph generation

Induce the module name from the library name. Report the libraries that can
not be mapped to a module. Make the resulting module dependency graph unique.
Add diagnostic options:

--help
--verbose
--version

Add convenience options (primary for caching):

--from-file
--to-file

Add output option

--output

Provide a manual page with hints how to hack on it.

Change-Id: Ib5c029c6ea197ca4f66fe6958ecbc3f78452c603

Makefile.in

@@ -407,6 +407,9 @@ check: dev-install subsequentcheck
 dump-deps:
 	@$(SRCDIR)/bin/module-deps.pl $(GNUMAKE) $(SRCDIR)/Makefile.gbuild
 
+dump-deps-png:
+	@$(SRCDIR)/bin/module-deps.pl $(GNUMAKE) $(SRCDIR)/Makefile.gbuild | dot -Tpng -o lo.png
+
 subsequentcheck :| $(if $(filter-out subsequentcheck,$(MAKECMDGOALS)),dev-install)
 	$(GNUMAKE) -j $(CHECK_PARALLELISM) $(GMAKE_OPTIONS) -f $(SRCDIR)/Makefile.gbuild $@