File permissions in tarball

[Peter Conlon]

Dear GNU

I downloaded GNU Hello 2.3 from the gnu project website.
./configure --prefix=$HOME/usr/local && make
works fine.

make install
fails.

To fix it, I had to grant execute permissions to the scripts in build-aux/
After doing this, make install works.

If there is a further release of Hello this should perhaps be changed unless 
there is a reason not to.

Given its status as a kind of gnu best practice example, it would be nice if it 
worked out of the box.

Best wishes,
Peter