cmake LDL examples

DrTimothyAldenDavis/SuiteSparse Example/CMakeLists.txt :102 

find_package ( LDL 3.3.3 REQUIRED )

jlblancoc/suitesparse-metis-for-windows SuiteSparse/Example/CMakeLists.txt :101 

find_package ( LDL 3.3.1 REQUIRED )