version: Update version to v2.1.1

The previous patch introduces a backwards compatible bug fix.

Bump the version to reflect this.

Signed-off-by: Suraj Jitindar Singh <sjitindarsingh@gmail.com>
Change-Id: If864822bbe0ef923cae43fda3313f4a43254bf60
diff --git a/configure.ac b/configure.ac
index e9512b2..d520a37 100644
--- a/configure.ac
+++ b/configure.ac
@@ -1,6 +1,6 @@
 # Initialization
 AC_PREREQ([2.69])
-AC_INIT([mboxd], [2.1.0], [https://github.com/openbmc/mboxbridge/issues])
+AC_INIT([mboxd], [2.1.1], [https://github.com/openbmc/mboxbridge/issues])
 AC_CONFIG_HEADERS([config.h])
 AM_INIT_AUTOMAKE([subdir-objects -Wall foreign dist-xz])
 AM_SILENT_RULES([yes])