gdb/ChangeLog: Update copyright year range in all GDB files
Signed-off-by: Tim Wiederhake <tim.wiederhake@intel.com> gdb/testsuite/ChangeLog: * gdb.python/py-record-btrace.c, gdb.python/py-record-btrace.exp, gdb.python/py-record-full.c, gdb.python/py-record-full.exp: New file. Change-Id: Icd919b4e1d5642f5cbc097a6aede1416eba402e5