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.
* cli/cli-cmds.c (shell_escape): Use waitpid. * rs6000-nat.c (exec_one_dummy_insn): Likewise. gdb/testsuite/ * gdb.base/async-shell.c: New file. * gdb.base/async-shell.exp: New file.