Two modifications: 1. The addition of 2013 to the copyright year range for every file; 2. The use of a single year range, instead of potentially multiple year ranges, as approved by the FSF.
gdb/ChangeLog: Copyright year update in most files of the GDB Project.
py-objfile-script-gdb.py.in. * gdb.python/py-objfile-script-gdb.py.in: Renamed from py-objfile-script-gdb.py. * gdb.python/py-objfile-script.exp: Update reference to py-objfile-script-gdb.py.