The threading example used a LauncherList to combine
two different but related examples into one.
I've now separated both into a shared directory called
'threading'
Pick-to: 6.6
Change-Id: Iee8898e61adcf69dc67157a1eff5f6ac019a39ca
Reviewed-by: Shawn Rutledge <shawn.rutledge@qt.io>