[yocto] Using wic from a Bitbake task

[Usman, Fahad]

Hello,
Is it possible to invoke 'wic create' command from a bitbake task. As 
currently it is implemented to be run as a standalone tool and if we 
invoke it from a task, the 'bitbake -e' command fails, since more than 
one instances of bitbake cannot be run from a single build directory.

We want to emit an SD card image as part of build artifacts when an 
image recipe is built. And we don't want to use the 
boot-directdisk.bbclass as it's going to be deprecated in favour of wic.

Thanks,
Fahad Usman.