doc: shuffle sections

doc/chapters/basic-api.texi

@@ -542,7 +542,7 @@ Return the interface associated with @var{handle} on @var{memory_node}.
 
 Each data interface is provided with a set of field access functions.
 The ones using a @code{void *} parameter aimed to be used in codelet
-implementations (see for example the code in @ref{Source code of Vector Scaling}).
+implementations (see for example the code in @ref{Scaling a Vector}).
 
 @deftp {Data Type} {enum starpu_data_interface_id}
 The different values are:

doc/chapters/c-extensions.texi

@@ -198,7 +198,7 @@ implementation may run in parallel with the continuation of the caller.
 The next section describes how memory buffers must be handled in
 StarPU-GCC code.  For a complete example, see the
 @code{gcc-plugin/examples} directory of the source distribution, and
-@ref{Extended C Source Code of Vector Scaling, the vector-scaling
+@ref{Vector Scaling Using the C Extension, the vector-scaling
 example}.