base-files: Create pre-installed catalog apps directory

:Release Notes:
Create the directory for the pre-installed catalog apps (PICA-s) IPKs:
${webos_picapkgdir}.

:Detailed Notes:

:Testing Performed:
Confirmed that the image contains the directory with the expected
permissions.

:QA Notes:

:Issues Addressed:
[GF-42606] Ongoing metadata improvement/cleanup work

Open-webOS-DCO-1.0-Signed-off-by: Herb Kuta <herb.kuta@lge.com>
Change-Id: I1d3e556099791a548d866fbe5a52cd8ef15112f7
Reviewed-on: https://g2g.palm.com/3628
Tested-by: Herb Kuta <herb.kuta@lge.com>
Build: Susan Montooth <susan.montooth@lge.com>
Reviewed-by: Susan Montooth <susan.montooth@lge.com>