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.
* symtab.c (symbol_find_demangled_name): Likewise. gdb/testsuite/ * gdb.cp/no-dmgl-verbose.cc: New file. * gdb.cp/no-dmgl-verbose.exp: New file.