cmake STRUMPACK examples

pghysels/STRUMPACK test/build_external/CMakeLists.txt :4 

find_package(STRUMPACK REQUIRED)

LLNL/hiop cmake/FindHiopSTRUMPACK.cmake :13 

find_package(STRUMPACK CONFIG
    PATHS ${STRUMPACK_DIR} ${HIOP_STRUMPACK_DIR}
    REQUIRED)