test: psa_pake: add specific log message for the opaque password

Signed-off-by: Valerio Setti <vsetti@baylibre.com>
diff --git a/tests/ssl-opt.sh b/tests/ssl-opt.sh
index 224c8c0..53fe49e 100755
--- a/tests/ssl-opt.sh
+++ b/tests/ssl-opt.sh
@@ -8016,6 +8016,8 @@
             0 \
             -c "add ciphersuite: c0ff" \
             -c "adding ecjpake_kkpp extension" \
+            -c "using opaque password" \
+            -s "using opaque password" \
             -C "re-using cached ecjpake parameters" \
             -s "found ecjpake kkpp extension" \
             -S "skip ecjpake kkpp extension" \