Travis CI: Try adding Coverity scan

.travis.yml

@@ -4,6 +4,18 @@ notifications:
   channels: "anathema.us.nu#anathema"
   use_notice: true
   skip_join: true
+env:
+ global:
+  - secure: "NB5gz8zMejijB1I4agUjAzYnc4lmxTk6ZGy6tc20zPhyCYXtnHFNvS0TYbpD6k1lF8mvDs0V9U+XPEFOxZf+4UOwZJfNsz/AuDAvP48cfeidNvFcZzOQ6rG60MJJ4oyy1KuemKTzZYI5r46+KBjrCa6Ne9HeAKFd4ze2f4H1nyU="
+addons:
+ coverity_scan:
+  project:
+   name: "pjanouch/ZyklonB"
+   description: "Experimental IRC bot & daemon"
+  notification_email: p.janouch@gmail.com
+  build_command_prepend: "cmake .. -DCMAKE_BUILD_TYPE=Release"
+  build_command: "make"
+  branch_pattern: coverity_scan
 compiler:
  - clang
  - gcc