This commit brings all the changes made by running gdb/copyright.py
as per GDB's Start of New Year Procedure.
For the avoidance of doubt, all changes in this commits were
performed by the script.
This patch adds support for running gdb natively on OpenRISC linux.
Debugging support is provided via the linux PTRACE interface which is
mostly handled by GDB genric code. This patch provides the logic of how
to read and write the ptrace registers between linux and GDB.
Single stepping is privided in a separate patch.
