Please include the local gnulib modules in releases

[Michael Pratt]

In other words, adding the "gl" directory from source to EXTRA_DIST or however 
you all would do it,
for those who wish to use the bootstrap script from a release, even though it 
is not recommended,
whether it is a modification of those local modules, or something else in a 
local gnulib,
so that extra steps to include them are not required from a release tarball.

--
MCP