Cleanup: rename sculpt_brushes.c -> sculpt_brush_types.c

This better differentiates sculpt brush types with brush data-blocks,
since the same sculpt brush type may be used for many brushes.

source/blender/editors/sculpt_paint/CMakeLists.txt

@@ -59,7 +59,7 @@ set(SRC
   sculpt.c
   sculpt_automasking.c
   sculpt_boundary.c
-  sculpt_brushes.c
+  sculpt_brush_types.c
   sculpt_cloth.c
   sculpt_detail.c
   sculpt_dyntopo.c

source/blender/editors/sculpt_paint/sculpt_intern.h

@@ -1502,7 +1502,7 @@ void SCULPT_OT_dyntopo_detail_size_edit(struct wmOperatorType *ot);
 
 void SCULPT_OT_dynamic_topology_toggle(struct wmOperatorType *ot);
 
-/* sculpt_brushes.c */
+/* sculpt_brush_types.c */
 
 float SCULPT_clay_thumb_get_stabilized_pressure(struct StrokeCache *cache);
 
@@ -1604,7 +1604,7 @@ void SCULPT_do_mask_brush(struct Sculpt *sd,
 void SCULPT_bmesh_topology_rake(
     struct Sculpt *sd, struct Object *ob, struct PBVHNode **nodes, int totnode, float bstrength);
 
-/* end sculpt_brushes.c */
+/* end sculpt_brush_types.c */
 
 /* sculpt_ops.c */
 void SCULPT_OT_brush_stroke(struct wmOperatorType *ot);