Added first version of conformance tests.

Change-Id: Ib75664194491643f8e4f1503a2ed942a2d1e1655
diff --git a/configure.ac b/configure.ac
index 14351a8..0615cd8 100644
--- a/configure.ac
+++ b/configure.ac
@@ -164,5 +164,5 @@
 export CXXFLAGS
 AC_CONFIG_SUBDIRS([gtest])
 
-AC_CONFIG_FILES([Makefile src/Makefile protobuf.pc protobuf-lite.pc])
+AC_CONFIG_FILES([Makefile src/Makefile conformance/Makefile protobuf.pc protobuf-lite.pc])
 AC_OUTPUT