Progress towards allowing installation in directories with whitespace

Progress towards allowing installation in directories with whitespace

* Makefile.in (COPYDESTS, write_subdir, install-arch-dep)
(install-arch-indep, install-etcdoc, install-info, install-man)
(install-etc, uninstall): Quote entities that might contain whitespace.

* build-aux/update-subdirs: Handle whitespace in argument.
Check cd return value.

* doc/emacs/Makefile.in (install-dvi, install-html, install-pdf)
(install-ps, uninstall-dvi, uninstall-html, uninstall-ps)
(uninstall-pdf): Quote entities that might contain whitespace.

* doc/lispintro/Makefile.in (install-dvi, install-html, install-pdf)
(install-ps, uninstall-dvi, uninstall-html, uninstall-ps)
(uninstall-pdf): Quote entities that might contain whitespace.

* doc/lispref/Makefile.in (install-dvi, install-html, install-pdf)
(install-ps, uninstall-dvi, uninstall-html, uninstall-ps)
(uninstall-pdf): Quote entities that might contain whitespace.

* doc/misc/Makefile.in (install-dvi, install-html, install-pdf)
(install-ps, uninstall-dvi, uninstall-html, uninstall-ps)
(uninstall-pdf): Quote entities that might contain whitespace.

* lib-src/Makefile.in ($(DESTDIR)${archlibdir}, need-blessmail, install)
(uninstall): Quote entities that might contain whitespace.

* nt/Makefile.in ($(DESTDIR)${archlibdir}, install, uninstall):
Quote entities that might contain whitespace.