askrene: use zlib for big tests

Signed-off-by: Lagrang3 <[email protected]>

Author: Lagrang3

external/Makefile

@@ -53,6 +53,10 @@ else
 LDLIBS += -lsodium
 endif
 
+ifeq ($(HAVE_ZLIB),1)
+LDLIBS += -lz
+endif
+
 EXTERNAL_LDLIBS := -L${TARGET_DIR} $(patsubst lib%.a,-l%,$(notdir $(EXTERNAL_LIBS)))
 
 submodcheck: $(FORCE)