superlu fails on JLSE

[koysean]

The superlu test fails at the compile stage with the following error:

/usr/bin/ld: cannot find -lopenblas

I believe this occurs due to the test assuming that superlu is built with openblas:

testsuite/validation_tests/superlu/compile.sh

Line 7 in 0e7604e

${TEST_CC} -g ./c_sample.c -I${SUPERLU_ROOT}/include/ -L${SUPERLU_ROOT}/lib64 -L${SUPERLU_ROOT}/lib -L${OPENBLAS_ROOT}/lib -lsuperlu -lopenblas -lm -o c_sample

So if superlu is built against any other BLAS provider the test fails.