cogl: renames cogl_multiply_matrix to cogl_transform

Although cogl_multiply_matrix was consistent with OpenGL, after further
consideration it was agreed that cogl_transform is a better name. Given
that it's in the global cogl_ namespace cogl_transform seems more self
documenting.

cogl/cogl.c

@@ -938,7 +938,7 @@ cogl_rotate (float angle, float x, float y, float z)
 }
 
 void
-cogl_multiply_matrix (const CoglMatrix *matrix)
+cogl_transform (const CoglMatrix *matrix)
 {
   CoglMatrixStack *modelview_stack =
     _cogl_framebuffer_get_modelview_stack (_cogl_get_framebuffer ());

cogl/cogl.h

@@ -348,7 +348,7 @@ cogl_rotate (float angle,
              float z);
 
 /**
- * cogl_multiply_matrix:
+ * cogl_transform:
  * @matrix: the matrix to multiply with the current model-view
  *
  * Multiplies the current model-view matrix by the given matrix.
@@ -356,7 +356,7 @@ cogl_rotate (float angle,
  * Since: 1.4
  */
 void
-cogl_multiply_matrix (const CoglMatrix *matrix);
+cogl_transform (const CoglMatrix *matrix);
 
 /**
  * cogl_get_modelview_matrix:

doc/reference/cogl/cogl-sections.txt

@@ -27,6 +27,7 @@ cogl_pop_matrix
 cogl_scale
 cogl_translate
 cogl_rotate
+cogl_transform
 cogl_frustum
 cogl_perspective
 cogl_ortho