[8u] RFR: 8236500: Windows ucrt.dll should be looked up in versioned WINSDK subdirectory

[Dmitry Cherepanov]

Bug: https://bugs.openjdk.java.net/browse/JDK-8236500
8u webrev: http://cr.openjdk.java.net/~dcherepanov/openjdk8u/8236500/webrev.v0/
11u patch: https://hg.openjdk.java.net/jdk-updates/jdk11u/rev/21c3971673cf

Applies cleanly after adjusting path. Sending this review request as I needed to update generated-configure.sh.

Testing: I encountered this issue when building 8u ("configure: error: Could not find any dlls in /cygdrive/c/progra~2/wi3cf2~1/10/Redist/ucrt/DLLs/x64") and this patch fixed this issue.

Thanks,

Dmitry