Added symbolic links to hTopoSort

diff --git a/helm/software/components/binaries/matitaprover/hTopoSort.ml b/helm/software/components/binaries/matitaprover/hTopoSort.ml
new file mode 120000 (symlink)
index 0000000..32bae99
--- /dev/null
+++ b/helm/software/components/binaries/matitaprover/hTopoSort.ml
@@ -0,0 +1 @@
+../../extlib/hTopoSort.ml
\ No newline at end of file

diff --git a/helm/software/components/binaries/matitaprover/hTopoSort.mli b/helm/software/components/binaries/matitaprover/hTopoSort.mli
new file mode 120000 (symlink)
index 0000000..d3f754d
--- /dev/null
+++ b/helm/software/components/binaries/matitaprover/hTopoSort.mli
@@ -0,0 +1 @@
+../../extlib/hTopoSort.mli
\ No newline at end of file