[gdbserver] Use enum target_signal in _send_signal.

[Pedro Alves]

Hi all,

This patch converts the send_signal function in target_ops to use enum 
target_signal
instead of the real target number.  I originally needed this for the 
WinCE gdbserver port.
Windows CE doesn't have signals support, and doesn't define SIGINT in 
any header.
Because of that, remote-utils.c wouldn't compile.  I still want to have 
support of stopping
a debuggee - this patch paves the way to that, with minimal interface 
changes.  I will handle
TARGET_SIGNAL_INT in the send_signal handler on the target side.

Ok?

Cheers,
Pedro Alves

---
gdb/gdbserver/ChangeLog:

2007-02-24  Pedro Alves  <pedro_alves@portugalmail.pt>

    * target.h (target_ops): Change parameter of send_signal from int to
    enum target_signal.
    * linux-low.c (linux_send_signal): Change parameter from int to
    enum target_signal.
    * spu-low.c (spu_send_signal): Likewise.
    * remote-utils.c (putpkt_binary): Pass TARGET_SIGNAL_INT instead
    of SIGINT.
    (input_interrupt): Likewise.

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