Files prefix changed from MGL to MLN (#919)

platform/default/src/mbgl/gfx/headless_frontend.cpp

@@ -35,7 +35,7 @@ HeadlessFrontend::HeadlessFrontend(Size size_,
               gfx::BackendScope guard {*getBackend()};
 
               // onStyleImageMissing might be called during a render. The user implemented method
-              // could trigger a call to MGLRenderFrontend#update which overwrites `updateParameters`.
+              // could trigger a call to MLNRenderFrontend#update which overwrites `updateParameters`.
               // Copy the shared pointer here so that the parameters aren't destroyed while `render(...)` is
               // still using them.
               auto updateParameters_ = updateParameters;