Updates hydra: b0064a6 Use UUID for boot device

diff --git a/hydra b/hydra
index 90a127db7e09d0518e18f7891b7921518e6141e5..b0064a62765f6109d3f2ac1a831799c63515969a 160000 (submodule)
--- a/hydra
+++ b/hydra
@@ -1 +1 @@
-Subproject commit 90a127db7e09d0518e18f7891b7921518e6141e5
+Subproject commit b0064a62765f6109d3f2ac1a831799c63515969a