Add POST_BUILD copy liblsl for VS debugging -- because windeployqt sometimes misses it

Author: cboulay

CMakeLists.txt

@@ -126,6 +126,10 @@ if (WIN32)
 		TARGET ${PROJECT_NAME} POST_BUILD
 		COMMAND ${QT5_WINDEPLOYQT_EXECUTABLE} --qmldir
 			${CMAKE_SOURCE_DIR} $<TARGET_FILE_DIR:${PROJECT_NAME}>)
+	add_custom_command(TARGET ${PROJECT_NAME} POST_BUILD
+		COMMAND ${CMAKE_COMMAND} -E copy_if_different  
+			$<TARGET_FILE:LSL::lsl>
+			$<TARGET_FILE_DIR:${PROJECT_NAME}>)
 	add_custom_command(
 		TARGET ${PROJECT_NAME} POST_BUILD
 		COMMAND ${CMAKE_COMMAND} -E copy