Don't hardcode packag name on Mac

OwnCloudCPack.cmake

@@ -17,7 +17,7 @@ set( CPACK_PACKAGE_VERSION  ${VERSION} )
 if(APPLE)
     set( CPACK_GENERATOR "DragNDrop" )
     set( CPACK_SOURCE_GENERATOR "")
-    set( CPACK_PACKAGE_FILE_NAME ownCloudClientSetup-${CPACK_PACKAGE_VERSION} )
+    set( CPACK_PACKAGE_FILE_NAME ${APPLICATION_NAME}-${CPACK_PACKAGE_VERSION} )
     set( CPACK_PACKAGE_ICON ${CMAKE_BINARY_DIR}/src/ownCloud.icns)
 
     set( CPACK_DMG_DS_STORE "${CMAKE_SOURCE_DIR}/admin/osx/DS_Store.in")