Add coverage report url to end of log output

.buildkite/coverage.yml

@@ -6,7 +6,8 @@ steps:
         echo "+++ :spiral_note_pad: Generating Code Coverage Report" && \
         /usr/bin/ninja EOS_ut_coverage && \
         echo "--- :arrow_up: Publishing Code Coverage Report" && \
-        buildkite-agent artifact upload "EOS_ut_coverage/**/*" s3://eosio-coverage/$BUILDKITE_JOB_ID
+        buildkite-agent artifact upload "EOS_ut_coverage/**/*" s3://eosio-coverage/$BUILDKITE_JOB_ID && \
+        printf "\033]1339;url=https://eosio-coverage.s3-us-west-2.amazonaws.com/$BUILDKITE_JOB_ID/EOS_ut_coverage/index.html;content=View Full Coverage Report\a\n"
     label: ":spiral_note_pad: Generate Report"
     agents:
       - "role=linux-coverage"