Increase verbosity level for reprojected markers info

This information is useful, but in cases when you, say,
working on a bundler it's annoying to scroll all the
information up.

Now behavior would be:
- running `./blender --debug-libmv` will print all the
  debug messages
- running `./blender --debug-libmv --verbose 0` will
  print only debug messages from solvers, recosntruction
  and so, but will bypass final reprojection bunch of
  messages
- running `./blender --debug-lib,v --verbose 1` will
  include final reprojection messages.

extern/libmv/libmv/simple_pipeline/pipeline.cc

@@ -300,7 +300,7 @@ double InternalReprojectionError(const Tracks &image_tracks,
            ex,
            ey,
            sqrt(ex*ex + ey*ey));
-    LG << line;
+    VLOG(1) << line;
 
     total_error += sqrt(ex*ex + ey*ey);
   }