src/Tools/Code/etc/settings

references to ghc and ocaml

ISABELLE_TOOLS="$ISABELLE_TOOLS:$COMPONENT/lib/Tools"

EXEC_GHC=$(choosefrom \
  "$ISABELLE_HOME/contrib/ghc" \
  "$ISABELLE_HOME/../ghc" \
  $(type -p ghc))

EXEC_OCAML=$(choosefrom \
  "$ISABELLE_HOME/contrib/ocaml" \
  "$ISABELLE_HOME/../ocaml" \
  $(type -p ocaml))