Refactoring louloulibs and cmake

Use OBJECT libraries
Remove the louloulibs directory
Write FOUND variables in the cache

cmake/Modules/FindLITESQL.cmake

@@ -64,7 +64,7 @@ function(LITESQL_GENERATE_CPP
   set(${OUTPUT_SOURCES})
   add_custom_command(
     OUTPUT "${CMAKE_CURRENT_BINARY_DIR}/${OUTPUT_NAME}.cpp"
-    "${CMAKE_CURRENT_BINARY_DIR}/${OUTPUT_NAME}.hpp"
+           "${CMAKE_CURRENT_BINARY_DIR}/${OUTPUT_NAME}.hpp"
     COMMAND  ${LITESQLGEN_EXECUTABLE}
     ARGS -t c++ --output-dir=${CMAKE_CURRENT_BINARY_DIR} ${CMAKE_CURRENT_SOURCE_DIR}/${SOURCE_FILE}
     DEPENDS ${SOURCE_FILE}