travis: Enable documentation build

Make sure Doxygen is installed before we build.

Signed-off-by: Daniel Stone <daniels@collabora.com>

diff --git a/.travis.yml b/.travis.yml
index 88dd261..4b2a66a 100644 (file)
--- a/.travis.yml
+++ b/.travis.yml
@@ -2,7 +2,7 @@ language: c
 
 before_install:
     - sudo apt-get update -qq
-    - sudo apt-get install xutils-dev
+    - sudo apt-get install xutils-dev doxygen
 
 compiler:
     - gcc