[bug-cppi] use mostly-non-recursive make

[Jim Meyering]

I should have sent most of this before releasing 1.16.

[01/19] build: remove use of vestigial rm_subst
[02/19] update bootstrap; don't recurse into lib/ or src/
[03/19] maint: remove useless artifacts copied from coreutils
[04/19] maint: man: use dist_man1_MANS, rather than
[05/19] build: don't recurse into man/ when building
[06/19] tests: add the help-version test
[07/19] build: don't recurse into tests/ when building
[08/19] maint: .gitignore: ignore/adjust a few more
[09/19] build: remove obsolete settings from cfg.mk
[10/19] maint: update init.sh from gnulib
[11/19] maint: remove redundant build output
[12/19] maint: use gnulib's getopt-gnu, not the deprecated
[13/19] maint: tweak m4 quoting in AC_CONFIG_FILES
[14/19] build: part two of using subdir-objects: handle e.g.,
[15/19] build: don't depend on help2man when building from
[16/19] doc: NEWS: mention our non-recursive make scheme
[17/19] version 1.16
[18/19] maint: post-release administrivia
[19/19] build: don't require /usr/bin/perl