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