[6.0] 5e77f1542 Forgot one build dependency

[Dridi Boukelmoune]

commit 5e77f1542013f0ac2bd477d6628ff808fac4838c
Author: Guillaume Quintard <guillaume at varnish-software.com>
Date:   Sun Aug 5 19:06:19 2018 -0700

    Forgot one build dependency

diff --git a/bin/varnishtest/Makefile.am b/bin/varnishtest/Makefile.am
index 200f43394..fdb640df0 100644
--- a/bin/varnishtest/Makefile.am
+++ b/bin/varnishtest/Makefile.am
@@ -85,6 +85,7 @@ teken_state.h:	$(srcdir)/sequences $(srcdir)/gensequences
 	awk -f $(srcdir)/gensequences $(srcdir)/sequences \
 	    > $(builddir)/teken_state.h
 
+vtc_h2_hpack.c: vtc_h2_dectbl.h
 vtc_h2_dectbl.h: huffman_gen.py $(top_srcdir)/include/tbl/vhp_huffman.h
 	$(srcdir)/huffman_gen.py $(top_srcdir)/include/tbl/vhp_huffman.h > $@_
 	mv $@_ $@