RFR: 8355697: Create windows devkit on wsl and msys2 [v2]

[kuaiwei]

On Mon, 28 Apr 2025 19:30:23 GMT, Magnus Ihse Bursie <ihse at openjdk.org> wrote:

>> kuaiwei has updated the pull request incrementally with one additional commit since the last revision:
>> 
>>   Get SDK_INSTALL_DIR from enviroment variable
>
> make/devkit/createWindowsDevkit.sh line 69:
> 
>> 67: elif test "x$IS_MSYS" != "x"; then
>> 68:     BUILD_ENV="cygwin"
>> 69:     CMD_EXE="cmd.exe //c"
> 
> The `//c` is a hacky solution. 
> 
> I think it would be better if you exported `MSYS2_ARG_CONV_EXCL="*"` -- you can do that without testing for windows environment since it does not really matter on anything but msys.
> 
> Then you can skip `CMD_EXE` and keep the single-slash variant for all environments.

Thanks for your comments. I added `MSYS2_ARG_CONV_EXCL="*"` in script and tested with msys.

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PR Review Comment: https://git.openjdk.org/jdk/pull/24916#discussion_r2065365968