Switches "core" back to core-1.0.1 (I screwed up in previous commit).

Signed-off-by: Vincent Zanotti <vincent.zanotti@m4x.org>

diff --git a/core b/core
index 2386dca..a7cdb59 160000 (submodule)
--- a/core
+++ b/core
@@ -1 +1 @@
-Subproject commit 2386dca38cb8aea249b3de8cc075a857498b7292
+Subproject commit a7cdb59477a657b04efb8dd3ff02eff8a2395633