agl-compositor: include runtime dependencies in PACKAGECONFIG for policy-rba

agl-compositor: include runtime dependencies in PACKAGECONFIG for policy-rba

Update the PACKAGECONFIG line to include run time dependencies next to the compile time dependencies.
Without these there is not policy file in the image leading to:

[14:54:42.539] Sending ready to systemd
[14:54:43.126] Unable to find /etc/rba/RBAModel.json file!!
[14:54:43.126] libwayland: error in client communication (pid 851)
[14:54:43.244] Unable to find /etc/rba/RBAModel.json file!!
[14:54:43.244] libwayland: error in client communication (pid 837)

Bug-AGL: SPEC-3738

Signed-off-by: Jan-Simon Moeller <jsmoeller@linuxfoundation.org>
Change-Id: I95052f51c24957c89aaa8da4385b7bf878eebf03
Reviewed-on: https://gerrit.automotivelinux.org/gerrit/c/AGL/meta-agl/+/25903
Tested-by: Jenkins Job builder account <agl-jobbuilder@automotivelinux.org>
ci-image-build: Jenkins Job builder account <agl-jobbuilder@automotivelinux.org>
ci-image-boot-test: Jenkins Job builder account <agl-jobbuilder@automotivelinux.org>