Fix user-provided BLAS/LAPACK dir in Cantera.mak
Fix user-provided BLAS/LAPACK dir in Cantera.mak

Fixes an error introduced in 5720d7cf908.

Heathckliff/cantera,imitrichev/cantera,imitrichev/cantera,Heathckliff/cantera,imitrichev/cantera,imitrichev/cantera,Heathckliff/cantera,imitrichev/cantera,imitrichev/cantera,Heathckliff/cantera,Heathckliff/cantera,Heathckliff/cantera