cmake: unset BUILD_GUI when Qt5 is not found#10171

maliberty merged 1 commit intoThe-OpenROAD-Project:masterThe-OpenROAD-Project/OpenROAD:masterfrom

alokkumardalei-wq:fix/unset-build-gui-when-qt5-missingalokkumardalei-wq/OpenROAD:fix/unset-build-gui-when-qt5-missingCopy head branch name to clipboard