BLI: Math: Rename BLI_math_rotation.hh in preparation for new rotation lib

Incoming with the new matrix API (D16625) are the new rotation types.
There is typename colision if we simply reuse the same header.

source/blender/blenkernel/intern/curve_poly.cc

@@ -6,7 +6,7 @@
 
 #include <algorithm>
 
-#include "BLI_math_rotation.hh"
+#include "BLI_math_rotation_legacy.hh"
 #include "BLI_math_vector.hh"
 
 #include "BKE_curves.hh"

source/blender/blenkernel/intern/curves_geometry.cc

@@ -13,7 +13,7 @@
 #include "BLI_bounds.hh"
 #include "BLI_index_mask_ops.hh"
 #include "BLI_length_parameterize.hh"
-#include "BLI_math_rotation.hh"
+#include "BLI_math_rotation_legacy.hh"
 #include "BLI_task.hh"
 
 #include "DNA_curves_types.h"

source/blender/blenlib/CMakeLists.txt

@@ -272,7 +272,7 @@ set(SRC
   BLI_math_matrix.h
   BLI_math_mpq.hh
   BLI_math_rotation.h
-  BLI_math_rotation.hh
+  BLI_math_rotation_legacy.hh
   BLI_math_solvers.h
   BLI_math_statistics.h
   BLI_math_time.h

source/blender/blenlib/intern/math_rotation.cc

@@ -5,7 +5,7 @@
  */
 
 #include "BLI_math_base.h"
-#include "BLI_math_rotation.hh"
+#include "BLI_math_rotation_legacy.hh"
 #include "BLI_math_vector.h"
 #include "BLI_math_vector.hh"
 

source/blender/blenlib/tests/BLI_math_rotation_test.cc

@@ -5,7 +5,7 @@
 #include "BLI_math_base.h"
 #include "BLI_math_matrix.h"
 #include "BLI_math_rotation.h"
-#include "BLI_math_rotation.hh"
+#include "BLI_math_rotation_legacy.hh"
 #include "BLI_math_vector.hh"
 
 #include "BLI_vector.hh"

source/blender/geometry/intern/fillet_curves.cc

@@ -7,7 +7,7 @@
 
 #include "BLI_devirtualize_parameters.hh"
 #include "BLI_math_geom.h"
-#include "BLI_math_rotation.hh"
+#include "BLI_math_rotation_legacy.hh"
 #include "BLI_task.hh"
 
 #include "GEO_fillet_curves.hh"