Silence misleading test_abort stderr output

Reviewed-by: Rich Salz <rsalz@openssl.org>

test/recipes/01-test_abort.t

diff --git a/test/recipes/01-test_abort.t b/test/recipes/01-test_abort.t
index 2f121e2..a6a7f31 100644
--- a/test/recipes/01-test_abort.t
+++ b/test/recipes/01-test_abort.t
@@ -13,4 +13,5 @@
 
 plan tests => 1;
 
+open STDERR, ">", "/dev/null";
 is(run(test(["aborttest"])), 0, "Testing that abort is caught correctly");