always get GNOME MIME type icons from the gnome subdir

sysui/desktop/share/create_tree.sh put the GNOME icons under
the gnome subdir and KDE icons under the hicolor and lolor dirs.
GNOME and KDE root dir is the same (/usr) on RedHat and FreeDesktop.
It is different (/opt vs. /usr) on SUSE. The directory
/opt/gnome/*/hicolor is available on SUSE but the LO icons
are installed only under the gnome subdir.

sysui/desktop/freedesktop/freedesktop-menus.spec

@@ -121,13 +121,9 @@ fi
 for subdir in `cd ${link_target_root}; ls -d *`
 do
   link_dir="%{gnome_dir}/share/icons/%{gnome_mime_theme}/$subdir/mimetypes"
+  link_target_dir="../../../gnome/$subdir/mimetypes/"
 
-  if [ ! -d "${link_dir}" ]
-  then
-    mkdir -p "${link_dir}"
-    link_target_dir="../../../gnome/$subdir/mimetypes/"
-  fi
-
+  test -d "${link_dir}" || mkdir -p "${link_dir}"
   test -d ${link_dir}/${link_target_dir} || continue
 
   icon=${link_target_dir}%iconprefix-drawing.png;                     test -f ${link_dir}/$icon && ln -sf ${icon} ${link_dir}/gnome-mime-application-vnd.sun.xml.draw.png

sysui/desktop/redhat/redhat-menus.spec

@@ -82,13 +82,9 @@ fi
 for subdir in `cd ${link_target_root}; ls -d *`
 do
   link_dir="%{gnome_dir}/share/icons/%{gnome_mime_theme}/$subdir/mimetypes"
+  link_target_dir="../../../gnome/$subdir/mimetypes/"
 
-  if [ ! -d "${link_dir}" ]
-  then
-    mkdir -p "${link_dir}"
-    link_target_dir="../../../gnome/$subdir/mimetypes/"
-  fi
-
+  test -d "${link_dir}" || mkdir -p "${link_dir}"
   test -d ${link_dir}/${link_target_dir} || continue
 
   icon=${link_target_dir}%iconprefix-drawing.png;                     test -f ${link_dir}/$icon && ln -sf ${icon} ${link_dir}/gnome-mime-application-vnd.sun.xml.draw.png

sysui/desktop/suse/suse-menus.spec

@@ -91,13 +91,9 @@ fi
 for subdir in `cd ${link_target_root}; ls -d *`
 do
   link_dir="%{gnome_dir}/share/icons/%{gnome_mime_theme}/$subdir/mimetypes"
+  link_target_dir="../../../gnome/$subdir/mimetypes/"
 
-  if [ ! -d "${link_dir}" ]
-  then
-    mkdir -p "${link_dir}"
-    link_target_dir="../../../gnome/$subdir/mimetypes/"
-  fi
-
+  test -d "${link_dir}" || mkdir -p "${link_dir}"
   test -d ${link_dir}/${link_target_dir} || continue
 
   icon=${link_target_dir}%iconprefix-drawing.png;                     test -f ${link_dir}/$icon && ln -sf ${icon} ${link_dir}/gnome-mime-application-vnd.sun.xml.draw.png