[PATCH][PR server/24377] Fix mixing English and system default languages in error messages on Windows

["Владимир Мартьянов" <vilgeforce@gmail.com>]

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The fourth argument of FormatMessage() in strwinerror() in file
win32-low.c is set to zero. Thus, Windows could use system default
locale to translate error codes to error message. At the same time,
gdbserver have hardcoded English error messages ("Error creating
process..." for example). As a result, server could display error
messages with mixed languages.

I made a patch to use en_US locale in FormatMessage, so all error
messages will be in English.

Changelog and patch files are attached

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gdb/gdbserver/ChangeLog:
2019-03-23  Vladimir Martyanov  <vilgeforce@gmail.com>

	PR server/24377
	* win32-low.c (strwinerror): Changed system deafult locale to
	en_US when translating Windows error code to message

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From 1bcfc9bdc14399f04c802ac5e4f4591538b9d2fd Mon Sep 17 00:00:00 2001
From: Vladimir Martyanov <vilgeforce@gmail.com>
Date: Sat, 23 Mar 2019 14:31:33 +0300
Subject: [PATCH] Fix mixing English and system default languages in error
 messages on Windows

---
 gdb/gdbserver/win32-low.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/gdb/gdbserver/win32-low.c b/gdb/gdbserver/win32-low.c
index 1a50141c12..226e0126d8 100644
--- a/gdb/gdbserver/win32-low.c
+++ b/gdb/gdbserver/win32-low.c
@@ -516,7 +516,7 @@ strwinerror (DWORD error)
 			       | FORMAT_MESSAGE_ALLOCATE_BUFFER,
 			       NULL,
 			       error,
-			       0, /* Default language */
+			       MAKELANGID(LANG_ENGLISH, SUBLANG_ENGLISH_US),
 			       (LPTSTR) &msgbuf,
 			       0,
 			       NULL);
-- 
2.16.2.windows.1