Ensure that macos builds create asset output directories for krbundles

CMakeLists.txt

@@ -222,6 +222,7 @@ ENDIF(CMAKE_BUILD_TYPE MATCHES DEBUG)
 
 add_subdirectory(standard_assets)
 
+
 SET(STANDARD_ASSET_LIST_FILE "${CMAKE_BINARY_DIR}/standard_assets_list")
 SET(STANDARD_ASSET_BUNDLE "${CMAKE_BINARY_DIR}/output/assets/standard_assets.krbundle")
 
@@ -230,6 +231,7 @@ FOREACH(line ${KRAKEN_STANDARD_ASSETS})
    SET(STANDARD_ASSET_LIST_FILE_CONTENTS "${STANDARD_ASSET_LIST_FILE_CONTENTS}${line}\n")
 ENDFOREACH(line)
 FILE(WRITE ${STANDARD_ASSET_LIST_FILE} ${STANDARD_ASSET_LIST_FILE_CONTENTS})
+FILE(MAKE_DIRECTORY "${CMAKE_BINARY_DIR}/output/assets")
 
 add_custom_command(
     OUTPUT ${STANDARD_ASSET_BUNDLE}