fix Issue 17472 - typeof(stdin) is no longer a File

[MartinNowak]

Fixup of #5421

[dlang-bot]

Fix	Bugzilla	Description
✓	17472	[Reg 2.075] typeof(stdin) is no longer a File

[MartinNowak]

Should fix the Jenkins dub project tester.

[andralex]

Was just working on a PR like this - including identical unittest :). Thanks!

[andralex]

BTW we should at some point consider making makeGlobal @trusted. In that case it should return a shared(File) and we should support shared methods for it.

[CyberShadow]

Thanks Martin, you're a star :)

[andralex]

Yah, that was a miraculous save. Thanks @MartinNowak !