cmake DUNE_SYS_HAS_LIB_BVTSDK examples

LSTS/dune cmake/Libraries/BVTSDK.cmake :48 

else(DUNE_SYS_HAS_LIB_BVTSDK AND DUNE_SYS_HAS_BVT_SDK_H)

LSTS/dune cmake/Libraries/BVTSDK.cmake :50 

endif(DUNE_SYS_HAS_LIB_BVTSDK AND DUNE_SYS_HAS_BVT_SDK_H)