Update .travis.yml

diff --git a/.travis.yml b/.travis.yml
index 3bc7c18..f453eed 100644 (file)
--- a/.travis.yml
+++ b/.travis.yml
@@ -1,5 +1,5 @@
 before_script: 
- - sudo add-apt-repository ppa:terry.guo/gcc-arm-embedded
+ - sudo add-apt-repository -y ppa:terry.guo/gcc-arm-embedded
  - sudo apt-get update -qq
  - sudo apt-get install -y gcc-arm-none-eabi