Collapse list of copyright years to ranges. See

Collapse list of copyright years to ranges.  See
<https://lists.gnu.org/archive/html/bug-gnulib/2012-03/msg00051.html>.

* build-aux/bootstrap.conf, build-aux/csharpcomp.sh.in,
build-aux/csharpexec.sh.in, build-aux/gnupload,
build-aux/install-reloc, build-aux/javacomp.sh.in,
build-aux/javaexec.sh.in, build-aux/ldd.sh.in,
build-aux/move-if-change, build-aux/reloc-ldflags,
build-aux/relocatable.sh.in, build-aux/x-to-1.in: Fix copyright.