Clang Tidy: enable readability-non-const-parameter warning

Clang Tidy reported a couple of false positives. I disabled
those `NOLINTNEXTLINE`.

Differential Revision: https://developer.blender.org/D8199

source/blender/freestyle/intern/blender_interface/BlenderFileLoader.h

@@ -128,7 +128,7 @@ class BlenderFileLoader {
                     bool em1,
                     bool em2,
                     bool em3,
-                    int clip[3]);
+                    const int clip[3]);
   void addTriangle(struct LoaderState *ls,
                    float v1[3],
                    float v2[3],