[master] b1d777d also include from builddir

[Nils Goroll]

commit b1d777da5843cab65c7c3abd150a69e8e6439070
Author: Nils Goroll <nils.goroll at uplex.de>
Date:   Mon May 5 18:18:24 2014 +0200

    also include from builddir

diff --git a/lib/libvarnishapi/Makefile.am b/lib/libvarnishapi/Makefile.am
index f0a23fa..1ee44dd 100644
--- a/lib/libvarnishapi/Makefile.am
+++ b/lib/libvarnishapi/Makefile.am
@@ -2,7 +2,7 @@
 
 AM_LDFLAGS  = $(AM_LT_LDFLAGS)
 
-AM_CPPFLAGS = -I$(top_srcdir)/include @PCRE_CFLAGS@
+AM_CPPFLAGS = -I$(top_srcdir)/include -I$(top_builddir)/include @PCRE_CFLAGS@
 
 lib_LTLIBRARIES = libvarnishapi.la