message: Update doc about CMake Integration
diff: @@ -169,7 +169,7 @@ This script setup LIEF as an *external project*
  set(LIEF_GIT_URL "https://github.com/lief-project/LIEF.git")
  # LIEF's version to be used (can be 'master')
  - set(LIEF_VERSION 0.6.1)
  + set(LIEF_VERSION 0.7.0)
  # LIEF compilation config
  set(LIEF_CMAKE_ARGS
  @@ -183,7 +183,7 @@ This script setup LIEF as an *external project*
  )
  ExternalProject_Add(LIEF
  - PREFIX "${PACKER_LIEF_PREFIX}"
  + PREFIX "${LIEF_PREFIX}"
  GIT_REPOSITORY ${LIEF_GIT_URL}
  GIT_TAG ${LIEF_VERSION}
  INSTALL_DIR ${LIEF_INSTALL_DIR}
  