Get rid of warning about datarootdir at the end of the configure process...

git-svn-id: https://origsvn.digium.com/svn/asterisk/trunk@30806 65c4cc65-6c06-0410-ace0-fbb531ad65f3

makeopts.in

@@ -24,6 +24,7 @@ prefix = @prefix@
 exec_prefix = @exec_prefix@
 
 bindir = @bindir@
+datarootdir = @datarootdir@
 datadir = @datadir@
 includedir = @includedir@
 infodir = @infodir@