This fix requires a patch to qt. This build includs a new pre-built Qt 5.12.3 with the patch applied.
See tools/qt5-builder/qtscript-crash-fix.patch to see actual patch applied.
* Touched bullet3 portfile to create new vckpg hash
* New urls for qt assets which include qscript patch hifi_vcpkg.py
* Updated tools/qt5-builder/ with qscript patch and README.md directions.
https://highfidelity.atlassian.net/browse/BUGZ-46
A qt bug was filed to hopefully get this bug fixed upstream.
https://bugreports.qt.io/browse/QTBUG-76176