update notification_email for Coverity Scan

Author: msakai

.travis.yml

@@ -22,7 +22,7 @@ matrix:
                   project:
                       name: "pfnet-research/menoh"
                       description: "Menoh: DNN inference library"
-                  notification_email: sakai@preferred.jp
+                  notification_email: menoh-oss@preferred.jp
                   build_command_prepend: cov-configure --compiler /usr/bin/g++-7 --comptype g++ -- -march=native -fPIC -std=gnu++14 && cmake -DMKLDNN_INCLUDE_DIR="$HOME/mkl-dnn/include" -DMKLDNN_LIBRARY="$HOME/mkl-dnn/lib/libmkldnn.so" .
                   build_command: make
                   branch_pattern: coverity_scan