Windows SDK 26100 splits headers into more msi files

[greaka]

I was chasing down an issue where winapifamily.h couldn't be found during a build. On old installations it still worked though.
After 3 weeks I finally figured out why it fails.

Starting with 10.0.26100, the windows sdk headers are split into the previously existing packages plus 4 new onecoreuap variants. The shared directory for example was completely moved out of the windows store apps headers package and into the windows store apps headers onecoreuap package, which also includes the missing winapifamily.h.

Here is an example entry for a onecoreuap package:

{
    "fileName": "Installers\\Windows SDK for Windows Store Apps Headers OnecoreUap-x86_en-us.msi",
    "sha256": "9234C4395D3C17673AEC0A7D32556AA85ADEDA0E3FDE8EF92C13601F844E0E6B",
    "size": 462848,
    "url": "https://download.visualstudio.microsoft.com/download/pr/e7508e1c-f746-4f1d-a5f0-74020753cca5/3dded07e9e6da4546077e58eaf5c8c44/windows%20sdk%20for%20windows%20store%20apps%20headers%20onecoreuap-x86_en-us.msi",
     "cache": false,
     "signer": {
         "$ref": "4"
     }
}

xwin fails to search and install these msi packages. I believe the correct location to add this would be when pruned.push() inside get_sdk is called.

Like in #126, reverting back to older sdk versions fixes my issue.

[memory-thrasher]

seconded. SDL needs this too, via winsdkver.h

[Jake-Shadle]

Resolved in #129