Update to trilinos 11.8.1
Fix valgrind issues from GUTS problems
Fix valgrind uninitialized access in SL_UMF
Merge pull request #37 from wortiz/valgrind-umf

Fix valgrind uninitialized access in SL_UMF
Merge pull request #36 from wortiz/valgrind-pull

Fix valgrind errors in GUTS problems and update to trilinos 11.8.1