travis: use the OP-TEE email for reporting

Signed-off-by: Joakim Bech <joakim.bech@linaro.org>
Acked-by: Jerome Forissier <jerome.forissier@linaro.org>
diff --git a/.travis.yml b/.travis.yml
index 27fbfa3..e804630 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -5,7 +5,7 @@
 notifications:
   email:
     recipients:
-      - joakim.bech@linaro.org
+      - op-tee@linaro.org
     on_success: change
     on_failure: always