Updates hydra: 41e1c80 Compile: fix variable expansion

diff --git a/hydra b/hydra
index 2ea382466e867128b26c97f6e60330345f28e16e..41e1c808791bc632eebbd69a44614c98dc4432ce 160000 (submodule)
--- a/hydra
+++ b/hydra
@@ -1 +1 @@
-Subproject commit 2ea382466e867128b26c97f6e60330345f28e16e
+Subproject commit 41e1c808791bc632eebbd69a44614c98dc4432ce