More extensive error reporting in sysdef perl tools. Allow sysdef merging with an empty upstream model.
component dev_build_sbsv1_scpp-abld
source \src\tools\build\sbsv1\scpp-abld
binary \src\tools\build\sbsv1\scpp-abld\group all
exports \src\tools\build\sbsv1\scpp-abld\group
notes_source \component_defs\release.src
ipr T