bug#21082: grep 'make check' fails

[Bruce Dubbs]

099-grep-2.21:FAIL: test-update-copyright.sh
099-grep-2.21:# FAIL:  1
099-grep-2.21:FAIL: test-update-copyright.sh
099-grep-2.21:FAIL  test-update-copyright.sh (exit status: 1)
099-grep-2.21:# FAIL:  1

Actually the problem is not due to grep but gnulib and perl-5.22. 
However it is in the grep source tarball.

The one line (one character) fix is:

 sed -i 's/copyright{/copyright\\{/' build-aux/update-copyright

Translation:  Escape the left brace in a perl regex.

I reported this to gnulib over a month ago but got no response.  Thought 
you would like to know.

  -- Bruce Dubbs
     linuxfromscratch.org