[6.0] a10584cd8 Somebody forgot LIBUNWIND_CFLAGS

[Dridi Boukelmoune]

commit a10584cd8cf54bc719c618137a2e91491ec542e4
Author: Poul-Henning Kamp <phk at FreeBSD.org>
Date:   Fri Nov 19 09:58:27 2021 +0000

    Somebody forgot LIBUNWIND_CFLAGS

diff --git a/bin/varnishd/Makefile.am b/bin/varnishd/Makefile.am
index bd7bce594..a1f870826 100644
--- a/bin/varnishd/Makefile.am
+++ b/bin/varnishd/Makefile.am
@@ -174,7 +174,7 @@ varnishd_LDADD = \
 	${DL_LIBS} ${PTHREAD_LIBS} ${NET_LIBS} ${RT_LIBS} ${LIBM}
 
 if WITH_UNWIND
-varnishd_CFLAGS += -DUNW_LOCAL_ONLY
+varnishd_CFLAGS += -DUNW_LOCAL_ONLY ${LIBUNWIND_CFLAGS}
 varnishd_LDADD += ${LIBUNWIND_LIBS}
 endif