Makefile.am: distribute the test dir too
diff --git a/Makefile.am b/Makefile.am
index 8db69fd..ff77ef1 100644
--- a/Makefile.am
+++ b/Makefile.am
@@ -61,6 +61,8 @@
 
 DISTCLEANFILES = ares_build.h
 
+DIST_SUBDIRS = test
+
 pkgconfigdir = $(libdir)/pkgconfig
 pkgconfig_DATA = libcares.pc