[Bug 52761] mscoree:mscoree test fails without a display or console

[WineHQ Bugzilla]

https://bugs.winehq.org/show_bug.cgi?id=52761

--- Comment #30 from Esme Povirk  ---
I can change the Wine tests, but I can't control how Windows programs invoke
csc.exe. I think it's not only possible but very likely that some Windows
programs start csc.exe with DETACHED_PROCESS. Currently, on Wine, that results
in a new console window, not for csc.exe but for mcs.exe. So I need a way I can
invoke mcs.exe that won't create a new console window regardless of how csc.exe
was started, and also not lose mcs.exe's output in the process.