Bug#942429: plasma-workspace: Keyboard lock state not reporting to lock screen or indicator plasmoid

[luca pedrielli <luca.pedrielli@gmail.com>]

I've found this solution:

- builded kguiaddons-5.62 on my pc

- copied 
src/debian/kguiaddons-5.62.0/obj-x86_64-linux-gnu/bin/kmodifierkey_xcb.so 
to 
/usr/lib/x86_64-linux-gnu/qt5/plugins/kf5/kguiaddons/kmodifierkey/kmodifierkey_xcb.so

Now sddm capslock alert works, keyboardindicator works and 
systemsettings numlock on/off on start works too·

kmodifierkey_xcb.so is a new file and pkg seems not install it.

Best, Luca.