This applies the second part of GDB's End of Year Procedure, which
updates the copyright year range in all of GDB's files.
gdb/ChangeLog:
Update copyright year range in all GDB files.
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
* breakpoint.c (update_global_location_list): Ignore previous
duplicate status of a breakpoint when starting a new scan for
duplicate breakpoints.
gdb/testsuite/ChangeLog
* gdb.base/duplicate-bp.c: New file.
* gdb.base/duplicate-bp.exp: New file.