Add some additional STL utility functions
Add some additional STL utility functions

Will be used in a subsequent patch.

Change-Id: Ib0e562fe8aa2537a7f2bd3a82e170d1ec30e6322
Reviewed-by: Kai Koehne <077bc265216106fb22408e62f2d97925ede69d10@qt.io>
Reviewed-by: Joerg Bornemann <47777b9406dbddd02a3fdca8341789a013805a11@qt.io>

qtproject/qt-labs-qbs,qt-labs/qbs,qt-labs/qbs,qtproject/qt-labs-qbs,qtproject/qt-labs-qbs,qtproject/qt-labs-qbs,qt-labs/qbs,qt-labs/qbs,qt-labs/qbs,qt-labs/qbs,qtproject/qt-labs-qbs,qtproject/qt-labs-qbs,qt-labs/qbs,qtproject/qt-labs-qbs