fix missing boost lib from ubuntu 20.04

gcontini

2021-05-20 f864724d3758da9df8583df00b202d1f578e42a3

fix missing boost lib from ubuntu 20.04

 .travis.yml

@@ -40,7 +40,7 @@
     - CTEST_OUTPUT_ON_FAILURE=1
     before_script:
         - sudo apt-get update
         - sudo apt-get install -y cmake libssl-dev zlib1g-dev libboost-dev libboost-test-dev libboost-iostreams-dev libboost-program-options-dev libboost-system-dev libboost-thread-dev libboost-date-time-dev
         - sudo apt-get install -y cmake libssl-dev zlib1g-dev libboost-dev libboost-filesystem-dev libboost-test-dev libboost-iostreams-dev libboost-program-options-dev libboost-system-dev libboost-thread-dev libboost-date-time-dev
         - cd build && cmake -DCMAKE_INSTALL_PREFIX=../../install -DCMAKE_BUILD_TYPE=Debug -DLCC_PROJECT_NAME=MYPROJECT ..
     script: 
         - cat /proc/mounts