[PATCH] gdb: fix IA64 build failure of linux-nat

[Kevin Buettner]

On Tue, 19 May 2020 22:27:10 +0100
Sergei Trofimovich via Gdb-patches <gdb-patches@sourceware.org> wrote:

> From: Sergei Trofimovich <siarheit@google.com>
> 
> On IA64 built failed as:
> 
> ```
> ia64-linux-nat.c:352:29: error: 'gdbarch_num_regs' was not declared in this scope
>   352 |   if (regno < 0 || regno >= gdbarch_num_regs (gdbarch))
>       |                             ^~~~~~~~~~~~~~~~
> ```
> 
> The fix includes "gdbarch.h" header where symbol is declared.
> 
> 	* gdb/ia64-linux-nat.c: include "gdbarch.h" to declare used
> 	'gdbarch_num_regs'.

Okay, but please capitalize "include" in the ChangeLog entry prior
to pushing this change.

Kevin