travis-ci enable coverity_scan

.travis.yml

@@ -0,0 +1,27 @@
+
+sudo: required
+
+services:
+  - docker
+
+language: cpp
+
+matrix:
+  fast_finish: true
+  include:
+    - env: BUILD_TARGET=coverity_scan
+      dist: trusty
+      if: branch = coverity_scan
+
+before_install:
+  - echo -n | openssl s_client -connect scan.coverity.com:443 | sed -ne '/-BEGIN CERTIFICATE-/,/-END CERTIFICATE-/p' | sudo tee -a /etc/ssl/certs/ca-
+
+addons:
+  coverity_scan:
+    project:
+      name: "PX4/ecl"
+      description: "Build submitted via Travis CI"
+    notification_email: ci@px4.io
+    build_command_prepend: "make distclean"
+    build_command: "make"
+    branch_pattern: coverity_scan