Make makefile work for shells that don't support <()

Signed-off-by: Henner Zeller <h.zeller@acm.org>

Makefile_test.common

diff --git a/Makefile_test.common b/Makefile_test.common
index 3c9d0b3..b3e086f 100644
--- a/Makefile_test.common
+++ b/Makefile_test.common
@@ -37,10 +37,11 @@
 	@echo "Running test $(1)"
 	@set +e; \
 	cd $(1); \
-	DESIGN_TOP=$(1) \
-	TEST_OUTPUT_PREFIX=./ \
-	yosys -c <(echo -e "source $(TEST_UTILS)\nsource $(1).tcl") -q -l $(1).log; \
+	echo -e "source $(TEST_UTILS)\nsource $(1).tcl" > run-$(1).tcl ;\
+	DESIGN_TOP=$(1) TEST_OUTPUT_PREFIX=./ \
+	yosys -c "run-$(1).tcl" -q -l $(1).log; \
 	RETVAL=$$$$?; \
+	rm -f run-$(1).tcl; \
 	if [ ! -z "$$($(1)_negative)" ] && [ $$($(1)_negative) -eq 1 ]; then \
 		if [ $$$$RETVAL -ne 0 ]; then \
 			echo "Negative test $(1) PASSED"; \