configure.ac: Update repository URL

Point it to the OpenBMC repository rather than Cyril's personal copy.

Change-Id: I70ead8e871e9f75d0a0f11c3cb4c4ee10b1e79fb
Signed-off-by: Andrew Jeffery <andrew@aj.id.au>
diff --git a/configure.ac b/configure.ac
index 707eefe..ced6911 100644
--- a/configure.ac
+++ b/configure.ac
@@ -1,6 +1,6 @@
 # Initialization
 AC_PREREQ([2.69])
-AC_INIT([mboxd], [1.0], [https://github.com/cyrilbur-ibm/mboxbridge/issues])
+AC_INIT([mboxd], [1.0], [https://github.com/openbmc/mboxbridge/issues])
 AC_CONFIG_HEADERS([config.h])
 AM_INIT_AUTOMAKE([subdir-objects -Wall foreign dist-xz])
 AM_SILENT_RULES([yes])