Add decoder-events to Makefile.am as well.

Makefile.am

@@ -3,10 +3,10 @@
 AUTOMAKE_OPTIONS = foreign 1.4
 ACLOCAL_AMFLAGS = -I m4
 EXTRA_DIST = ChangeLog COPYING LICENSE suricata.yaml \
-	doc/AUTHORS doc/GITGUIDE doc/INSTALL doc/NEWS \
+             doc/AUTHORS doc/GITGUIDE doc/INSTALL doc/NEWS \
-	doc/README doc/TODO doc/INSTALL.PF_RING \
+             doc/README doc/TODO doc/INSTALL.PF_RING \
-        doc/INSTALL.WINDOWS classification.config \
+             doc/INSTALL.WINDOWS classification.config \
-        reference.config
+             reference.config rules/decoder-events.rules
 if BUILD_LIBHTP
  HTP_DIR = libhtp
 endif