Fix compat.sh not running any tests on config-mini-tls1_1.h

We were only requesting 3DES cipher suites (which is weirdly restrictive
since the configuration also includes AES), but DES is in the default
exclusion list for compat.sh, so we ended up having no acceptable cipher
suites. Fix this.

Signed-off-by: Gilles Peskine <Gilles.Peskine@arm.com>
diff --git a/tests/scripts/test-ref-configs.pl b/tests/scripts/test-ref-configs.pl
index efe716e..f29afc5 100755
--- a/tests/scripts/test-ref-configs.pl
+++ b/tests/scripts/test-ref-configs.pl
@@ -27,7 +27,8 @@
         'test_again_with_use_psa' => 1
     },
     'config-mini-tls1_1.h' => {
-        'compat' => '-m tls1_1 -f \'^DES-CBC3-SHA$\|^TLS-RSA-WITH-3DES-EDE-CBC-SHA$\'', #',
+         # Include DES; exclude (EC)DH; only pure-RSA key exchanges
+        'compat' => '-m tls1_1 -e \'NULL\|RC4\|ARCFOUR\|ARIA\|CAMELLIA\|DH\|PSK\' -f RSA',
         ## Skip ssl-opt testing for now because ssl-opt.sh is missing a lot
         ## of requires_xxx so it would try to run tests that don't apply.
         # 'opt' => ' ',