.travis.yml: fix HTML report filename.

Correction for 0176ffc commit.

Author: php-coder

.travis.yml

@@ -40,7 +40,7 @@ after_failure:
   # Just encode it to a gzipped binary form and dump to console.
   - if fgrep -qs 'status="FAIL"' target/robotframework-reports/output.xml; then
       echo "===== REPORT START =====";
-      cat target/robotframework-reports/output.html | gzip -c | base64;
+      cat target/robotframework-reports/log.html | gzip -c | base64;
       echo "===== REPORT END =====";
     fi