[4.1] 5e84d03 Fix sourcing of varnish.m4 when building on FreeBSD

[PÃ¥l Hermunn Johansen]

commit 5e84d0301ad50221269f26777fda88c52ab729c1
Author: Mark Felder <feld at FreeBSd.org>
Date:   Mon Aug 7 19:16:42 2017 -0500

    Fix sourcing of varnish.m4 when building on FreeBSD

diff --git a/Makefile.am b/Makefile.am
index 321b458..e86049c 100644
--- a/Makefile.am
+++ b/Makefile.am
@@ -1,4 +1,4 @@
-ACLOCAL_AMFLAGS = -I m4
+ACLOCAL_AMFLAGS = -I m4 -I .
 
 SUBDIRS = include lib bin etc doc man