The `stdbuf.exe` program links to a `libstdbuf.so` file, so if that does
not exist, there is a problem.
In d9773f0a (coreutils: Update to 8.24, 2015-08-28), a sed call was
introduced to ensure that `libstdbuf.so` is built and installed under
that name, without `.exe` suffix.
As reported in https://github.com/Alexpux/MSYS2-packages/issues/541,
however, that fix no longer works, the `libstdbuf.so.exe` file is in
coreutils 8.26-1.
Let's just rename the `libstdbuf.so.exe` file after it has been
installed into the `pkgdir` tree.
Note: we still have to muck around with `Makefile.in` so that the build
does not break with
make[2]: *** No rule to make target 'src/libstdbuf.so', needed
by 'all-am'. Stop.
Signed-off-by: Johannes Schindelin <johannes.schindelin@gmx.de>
7e7afe0922