1.0.44.7: ir1: Set LAMBDA-VAR-EXPLICIT-VALUE-CELL where possible.

1.0.44.7: ir1: Set LAMBDA-VAR-EXPLICIT-VALUE-CELL where possible.

  * Add a new stage to PHYSENVANAL, after tail-annotation to
fix up indirect (wanting value-cell) LAMBDA-VARs.

  * For each non-dynamic-extent CLAMBDA in the component,
mark all of the LAMBDA-VARs as needing an explicit value cell.

  * This analysis is correct as far as it goes, but it turns
out that marking CLAMBDAs as being dynamic-extent isn't done
in several cases that one would naively expect it to, thus
defeating most of the point of this analysis.