* doc/local.mk ($(srcdir)/doc/stamp-vti): Change rule into...
(version.texi-from-git): ...this new function. Call it with vti,guix.texi,;
and for all MANUAL_LANGUAGES with $(i),po/doc/guix-manual.$(lang).po,
-$(lang.po).
Change-Id: Ia8df618178066cad320eecea0299337224e23a73