Add some sub-Makefile.am's in the libevent tree

This commit was SVN r903.

configure.ac

@@ -721,6 +721,8 @@ AC_CONFIG_FILES([
     src/util/Makefile
 
     src/event/Makefile
+    src/event/compat/Makefile
+    src/event/compat/sys/Makefile
 
     src/attribute/Makefile
     src/communicator/Makefile

src/event/compat/Makefile.am

@@ -0,0 +1,7 @@
+#
+# $HEADER$
+#
+
+include $(top_srcdir)/config/Makefile.options
+
+SUBDIRS = sys

src/event/compat/sys/Makefile.am

@@ -0,0 +1,7 @@
+#
+# $HEADER$
+#
+
+include $(top_srcdir)/config/Makefile.options
+
+noinst_HEADERS = queue.h _time.h tree.h