build: update the bug reporting URL to github

Update the bug reporting URL to github issues page. This makes it easier
to track bugs and fits into the git workflow.

Signed-off-by: Kamalesh Babulal <kamalesh@linux.vnet.ibm.com>

Author: kamalesh-babulal

configure.ac

@@ -1,5 +1,5 @@
 # Process this file with autoconf to produce a configure script.
-AC_INIT([sysfsutils], [2.1.0], [linux-diag-devel@lists.sourceforge.net])
+AC_INIT([sysfsutils], [2.1.0], [https://github.com/linux-ras/sysfsutils/issues])
 AC_CONFIG_SRCDIR([cmd/systool.c])
 AC_CONFIG_MACRO_DIR([m4])