add missing apt-get upgrade within .travis.yml
diff --git a/.travis.yml b/.travis.yml
index 7e654f3..e024e21 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -24,6 +24,7 @@
# 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