pkg: If the adjunct proto is a package image, use it for dependency resolution

*** 248,261 ****
  SYNTH_PKGS= osnet-incorporation osnet-redist
  DEP_SYNTH_PKGS= $(SYNTH_PKGS:%=$(PDIR)/%.dep)
  PROC_SYNTH_PKGS= $(SYNTH_PKGS:%=$(PDIR)/%.mog)
  
  #
! # Root of pkg image to use for dependency resolution
! # Normally / on the machine used to build the binaries
  #
! PKGDEP_RESOLVE_IMAGE = /
  
  #
  # For each package, we determine the target repository based on
  # manifest-embedded metadata.  Because we make that determination on
  # the fly, the publication target cannot be expressed as a
--- 248,267 ----
  SYNTH_PKGS= osnet-incorporation osnet-redist
  DEP_SYNTH_PKGS= $(SYNTH_PKGS:%=$(PDIR)/%.dep)
  PROC_SYNTH_PKGS= $(SYNTH_PKGS:%=$(PDIR)/%.mog)
  
  #
! # Root of pkg image to use for dependency resolution Normally / on the machine
! # used to build the binaries, or the ADJUNCT_PROTO
  #
! PKG_ADJUNCT.cmd= if [[ -d $${ADJUNCT_PROTO}/var/pkg ]]; then \
!                 echo $$ADJUNCT_PROTO; \
!         else    \
!                 echo /; \
!         fi
! 
! PKGDEP_RESOLVE_IMAGE = $(PKG_ADJUNCT.cmd:sh)
  
  #
  # For each package, we determine the target repository based on
  # manifest-embedded metadata.  Because we make that determination on
  # the fly, the publication target cannot be expressed as a