[gnome-commander] Adds gtk-doc-tools to dependencies

[Uwe Scholz <uwescholz src gnome org>]

commit 38291befe649ddcb59c3356eca1b4c2098d5e466
Author: Uwe Scholz <uwescholz src gnome org>
Date:   Sat Nov 7 22:13:52 2015 +0100

    Adds gtk-doc-tools to dependencies

 .travis.yml |    2 +-
 1 files changed, 1 insertions(+), 1 deletions(-)
---
diff --git a/.travis.yml b/.travis.yml
index a6d2ed0..84c6bc8 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -9,7 +9,7 @@ before_install:
 
 install:
   - sudo apt-get update -qq
-  - sudo apt-get install -qq gnome-common
+  - sudo apt-get install -qq gnome-common gtk-doc-tools
 
 script:
   - ./autogen.sh