sundials2 does not appear to make use of SuiteSparse_KLU

[szhorvat (Szabolcs Horvát)]

sundials2 is marked as depending on SuiteSparse_KLU but it does not seem to link to SuiteSparse_KLU.

This gives nothing:

port contents sundials2 | grep dylib | xargs -L1 otool -L | grep klu

This also gives nothing:

cd /opt/local/libexec/sundials2/include/
grep klu -R .

This suggests that klu.h is never included.

It should be verified if sundials2 is able to make use of SuiteSparse_KLU, and either fix the situation or remove the dependency.