jimtcl: update to 0.71 based release

The actual release is 411e92fea9621630eb350e0c2bb43543e553b84f as we
had a few issues relating to its use within openocd.

Signed-off-by: Spencer Oliver <ntfreak@users.sourceforge.net>

diff --git a/jimtcl b/jimtcl
index 60dfb023c4afa95047e0fa8db49830ccb46446b2..411e92fea9621630eb350e0c2bb43543e553b84f 160000 (submodule)
--- a/jimtcl
+++ b/jimtcl
@@ -1 +1 @@
-Subproject commit 60dfb023c4afa95047e0fa8db49830ccb46446b2
+Subproject commit 411e92fea9621630eb350e0c2bb43543e553b84f