Add correct rpath for Vulkan SDK on macOS (#17)

Author: shg8

CMakeLists.txt

@@ -67,6 +67,9 @@ FetchContent_MakeAvailable(imgui)
 
 if (APPLE)
     add_compile_definitions(__APPLE__)
+
+    set(CMAKE_BUILD_WITH_INSTALL_RPATH TRUE)
+    set(CMAKE_INSTALL_RPATH "/usr/local/lib")
 endif ()
 
 if (CMAKE_BUILD_TYPE MATCHES Debug)
@@ -89,4 +92,4 @@ add_subdirectory(apps)
 #        COMMAND ${CMAKE_COMMAND} -E copy_directory
 #        "${PROJECT_BINARY_DIR}/shaders"
 #        "$<TARGET_FILE_DIR:vulkan_splatting>/shaders"
-#)
+#)