cmake HAVE_UNWIND_LIB examples

tanis2000/binocle-c src/deps/luajit-cmake/LuaJIT.cmake :185 

message(STATUS "#### HAVE_UNWIND_LIB is ${HAVE_UNWIND_LIB}")

fluent/fluent-bit lib/luajit-cmake/LuaJIT.cmake :207 

message(STATUS "#### HAVE_UNWIND_LIB is ${HAVE_UNWIND_LIB}")