[tlbuild] Patch needed in source/utils/xindy

[Bruno Haible]

Hi Nelson,

> The problem is that those commands generate this failing one-liner:
> 
> STRIPPROG='strip' /bin/sh /local/build/bare/texlive-20190805/source/build-aux/install-sh   \
>     -c -s "/usr/local/lib/clisp/base/lisp.run"                                             \
>     "/local/build/bare/texlive-20190805/source/inst/bin/i586-unknown-freebsd13.0/xindy.run"
> 
> It fails because the install-sh copies the vendor file lisp.run into
> the TeX Live file xindy.run, and then applies the strip command to the
> latter. On this system, the lisp.run file has protection -r-xr-xr-x,
> so xindy.run gets the same protection, and the strip command dies
> because it lacks permission to rewrite that file.

How is this possible? The default mode in install-sh is 0755, and there
is explicit code (search for the comment "'strip' requires both read and
write access to temps.") to make sure 'strip' won't fail due to missing
write access.

Does running this script with "/bin/sh -x ..." reveal more details?

Bruno