try to add libftdi1 to travis

.travis.yml

@@ -2,14 +2,21 @@ language: cpp
 compiler: gcc
 dist: trusty
 
+addons:
+  apt:
+    packages:
+      - pkg-config
+      - libusb-1.0-0-dev
+
 before_install:
 # C++11
 - sudo add-apt-repository -y ppa:ubuntu-toolchain-r/test
+- sudo add-apt-repository -y ppa:kbs/kbs
 - sudo apt-get update -qq
 
 install:
 # C++11
-- sudo apt-get install -qq g++-5
+- sudo apt-get install -qq g++-5 libftdi1-2 libftdi1-dev libftdipp1-2 libftdipp1-dev
 
 script:
 - qmake ponyprog.pro -r -spec linux-g++-64 CONFIG+=debug QMAKE_CXX=g++-5 QMAKE_LINK=g++-5