Add support for swh package using src/swh directory structure

docs/devel/bin/ln-sphinx-subprojects

@@ -17,6 +17,9 @@ create_links () {
         if [ -d "../../../${pymodule}/swh" ] ; then
             cp -r -f --symbolic-link $(realpath ../../../${pymodule}/swh/*) sources/swh/
         fi
+        if [ -d "../../../${pymodule}/src/swh" ] ; then
+            cp -r -f --symbolic-link $(realpath ../../../${pymodule}/src/swh/*) sources/swh/
+        fi
         pushd ../../../${pymodule}
         for EXT in rst md; do
             if [ -f README.$EXT -a ! -f docs/README.$EXT ] ; then