Ignore the non-zero returns, go on executing the remaining test.

Signed-off-by: hongbo.zhang <hongbo.zhang@linaro.com>
diff --git a/Test.mk b/Test.mk
index 76f79b5..671bbf5 100644
--- a/Test.mk
+++ b/Test.mk
@@ -44,7 +44,7 @@
 	@echo -n "### "; cat $(<:.sh=.txt);
 	@echo -n "### "; grep "URL :" ./$< | awk '/http/{print $$NF}'
 	@echo "###"
-	@./$< 2> $@
+	-@./$< 2> $@
 else
 run_tests: $(SNT)
 	@cat $(<:.sh=.txt)