message: Fix memory corruption with latest nicer
diff: set(NICER_BUILD "${CMAKE_CURRENT_BINARY_DIR}/libdeps/nicer")
  ExternalProject_Add(project_nicer
  GIT_REPOSITORY "https://github.com/lynckia/nicer.git"
  - GIT_TAG "1.3"
  + GIT_TAG "1.4"
  PREFIX ${NICER_BUILD}
  CMAKE_ARGS -DCMAKE_INSTALL_PREFIX:PATH=${NICER_BUILD}
  DOWNLOAD_DIR "${NICER_BUILD}/src"
  