packagegroup-webos-extended: Add VIRTUAL-RUNTIME_novacomd

:Release Notes:
Allow other distros to replace novacomd with an alternative package.

:Detailed Notes:

:Testing Performed:
- Build was successful.
- MiniBAT.

:QA Notes:

:Issues Addressed:
[GF-19666] Allow the package that supplies novacomd to be selected by the
           distro
[GF-13301] CCC: packagegroup-webos-extended=r21

Open-webOS-DCO-1.0-Signed-off-by: Sangwoo Kang <sangwoo82.kang@lge.com>
change-Id: I89c778f4d2dbadd35bf3c55065e6dd4a7f33a446
Reviewed-on: https://g2g.palm.com/2984
Reviewed-by: Keith Derrick <keith.derrick@lge.com>
Tested-by: Keith Derrick <keith.derrick@lge.com>
Reviewed-by: Sangwoo Kang <sangwoo82.kang@lge.com>
Reviewed-by: Build Verification
Reviewed-by: Ed Chejlava <ed.chejlava@lge.com>
Reviewed-by: Susan Montooth <susan.montooth@lge.com>