Update superlu commit tag for Mac compatibility. Broken build due to known superlu issue (https://github.com/xiaoyeli/superlu/issues/91) that was fixed in superlu version 6. SAIGE does not build on updated Mac clang compilers using the older superlu version.
Update superlu commit tag for Mac compatibility. Broken build due to known superlu issue (https://github.com/xiaoyeli/superlu/issues/91) that was fixed in superlu version 6. SAIGE does not build on updated Mac clang compilers using the older superlu version.