HPCC-9042 Correct Rembed using incorrect variable for found

Move from R_FOUND to MAKE_REMBED for the variable marking dependency
as found.

Signed-off-by: Philip Schwartz <philip.schwartz@lexisnexis.com>
Merge pull request #4169 from pschwartz/HPCC-9042-change-r-found-var-used

HPCC-9042 Correct Rembed using incorrect variable for found

Reviewed-By: Richard Chapman <rchapman@hpccsystems.com>