add missing apt-get upgrade within .travis.yml

diff --git a/.travis.yml b/.travis.yml
index 7e654f3..e024e21 100644 (file)
--- a/.travis.yml
+++ b/.travis.yml
@@ -24,6 +24,7 @@ language: cpp
 # see what we need: http://thrift.apache.org/docs/install/ubuntu
 before_install:
  - sudo apt-get update -qq
+ - sudo apt-get upgrade -qq
  - sudo apt-get install -qq libboost-dev libboost-test-dev libboost-program-options-dev libevent-dev automake libtool flex bison pkg-config g++ libssl-dev 
 # Java
  - sudo apt-get install -qq libcommons-lang3-java ant