make sure user help folder exists

git-svn-id: https://svn.osgeo.org/grass/grass/trunk@46239 15284696-431f-4ddb-bdfa-cd5b030d7da7

macosx/app/build_html_user_index.sh

@@ -184,4 +184,5 @@ done
 
 # add Help Viewer link in user docs folder
 
+mkdir -p $HOME/Library/Documentation/Help/
 ln -sfh ../../GRASS/$GRASS_MMVER/Modules/docs/html $HOME/Library/Documentation/Help/GRASS-$GRASS_MMVER