Enable caching of apt-get install on Travis.

2a97e575 · Lars Bilke · cf409251 · 2a97e575
Commit 2a97e575 authored 11 years ago by Lars Bilke
--- a/.travis.yml
+++ b/.travis.yml
@@ -4,6 +4,9 @@ compiler:
  - gcc
  - clang

+cache:
+  - apt
+
 branches:
  only:
    - master