[PATCH] gdbserver: Add LoongArch/Linux port support

[Eli Zaretskii]

> From: Youling Tang <tangyouling@loongson.cn>
> Date: Tue, 31 May 2022 10:45:42 +0800
> Cc: "Maciej W. Rozycki" <macro@orcam.me.uk>
> 
> 2022-05-31  Youling Tang <tangyouling@loongson.cn>
> 
> 	gdb/
> 	* NEWS: Mention LoongArch GNU/Linux GDBserver support.
> 	* arch/loongarch.h: Declare the loongarch_create_target_description
> 	function when GDBSERVER is defined.
> 
> 	gdbserver/
> 	* linux-loongarch-low.cc: New file.
> 	* Makefile.in (SFILES): Add linux-loongarch-low.cc and
> 	arch/loongarch.c.
> 	* configure.srv <loongarch*-*-linux*> (srv_tgtobj)
> 	srv_linux_regsets, srv_linux_usrregs, srv_linux_thread_db):
> 	Define.

OK for the NEWS part.

Thanks.