cue/load: include module file in build.Instance
This makes the module file, including dependency and
language version info, available to `cue/load.Instances`
callers.
Signed-off-by: Roger Peppe <rogpeppe@gmail.com>
Change-Id: I4f9a955dd30c1564ae0d73d91f9282ebff1c4c34
Reviewed-on: https://review.gerrithub.io/c/cue-lang/cue/+/1217063
Unity-Result: CUE porcuepine <cue.porcuepine@gmail.com>
Reviewed-by: Daniel Martí <mvdan@mvdan.cc>
Reviewed-by: Marcel van Lohuizen <mpvl@gmail.com>
TryBot-Result: CUEcueckoo <cueckoo@cuelang.org>