Travis: install missing packages

Signed-off-by: Valentin Rothberg <rothberg@redhat.com>

.travis.yml

@@ -1,5 +1,5 @@
 language: go
-
+dist: xenial
 sudo: required
 
 services:
@@ -9,7 +9,7 @@ before_install:
   - if [ "${TRAVIS_OS_NAME}" = linux ]; then make vendor; fi
   - if [ "${TRAVIS_OS_NAME}" = linux ]; then ./hack/tree_status.sh; fi
   - if [ "${TRAVIS_OS_NAME}" = linux ]; then sudo apt-get -qq update; fi
-  - if [ "${TRAVIS_OS_NAME}" = linux ]; then sudo apt-get -qq install btrfs-tools libdevmapper-dev libgpgme11-dev libseccomp-dev; fi
+  - if [ "${TRAVIS_OS_NAME}" = linux ]; then sudo apt-get -qq install btrfs-tools linux-libc-dev libc-dev libdevmapper-dev libgpgme11-dev libseccomp-dev realpath libglib2.0-dev; fi
   - if [ "${TRAVIS_OS_NAME}" = linux ]; then sudo apt-get -qq install autoconf automake bison clang-format-3.9 e2fslibs-dev libfuse-dev libtool liblzma-dev gettext; fi
   - if [ "${TRAVIS_OS_NAME}" = osx ]; then brew update && brew install gpgme; fi
 
@@ -30,7 +30,6 @@ install:
 
 before_script:
   - export PATH=$HOME/gopath/bin:$PATH
-  - export LD_LIBRARY_PATH=/usr/local/lib${LD_LIBRARY_PATH:+:${LD_LIBRARY_PATH}}
 
 env: