add submodule for all upstream repos

[ghc-hetmet.git] / libraries / mtl

diff --git a/libraries/mtl b/libraries/mtl
new file mode 160000 (submodule)
index 0000000..a748dfa
--- /dev/null
+++ b/libraries/mtl
@@ -0,0 +1 @@
+Subproject commit a748dfa2770af1d348dfaa8ad6955b25b4935711