autogen.sh: fix typo in common configuration options

Signed-off-by: Petr Uzel <petr.uzel@suse.cz>
diff --git a/autogen.sh b/autogen.sh
index 55ee03a..b27e38d 100755
--- a/autogen.sh
+++ b/autogen.sh
@@ -28,7 +28,7 @@
 else
 args="$args \
 --with-rootprefix= \
----with-rootlibdir=$(libdir /lib) \
+--with-rootlibdir=$(libdir /lib) \
 --bindir=/sbin \
 --libexecdir=/lib \
 --with-systemdsystemunitdir=/lib/systemd/system \