Pass correct version to autoreconf

It seems that AC_INIT macro is wrongly initialized. See this link
for explanation of a particular AC_INIT variables:

http://www.gnu.org/software/autoconf/manual/html_node/Initializing-configure.html

Briefly, AC_INIT macro should be populated with the following data:

AC_INIT (package, version, [bug-report], [tarname], [url])

Signed-off-by: Peter Lemenkov <lemenkov@gmail.com>

src/configure.ac

@@ -2,7 +2,7 @@
 # Process this file with autoconf to produce a configure script.
 
 AC_PREREQ(2.53)
-AC_INIT(ejabberd.erl, version, [ejabberd@process-one.net], [ejabberd])
+AC_INIT(ejabberd, m4_esyscmd([grep -o -E "\{vsn,.\".*\"\}" ejabberd.app | cut -d \" -f 2 | tr -d '\n']), [ejabberd@process-one.net], [ejabberd])
 
 # Checks for programs.
 AC_PROG_CC