docs-common Makefile.common,1.52,1.53

[Tommy Reynolds]

Uttered "Paul W. Frields" <stickster at gmail.com>, spake thus:

> > > Add src-tarball phony target for use when VERSION isn't known externally
> > When is the version not known?
> Keeping the build-docs simple on webtest.f.r.c, there is not a lot of
> logic built in for finding current version numbers, but we want to be
> able to generate a .src.tar.gz for use in FE review if needed.

OK.  I knew there was a reason.

Cheers