Move the ubuntu build script to 18.04

Summary: [Folly] Move the ubuntu build script to 18.04 from 14.04 and the boost default dep to 1.65.1.

Reviewed By: fredemmott

Differential Revision: D22779335

fbshipit-source-id: 61be6ef8f3cefa05a8d016a061cbc42605215711

folly/build/build-debs-ubuntu-14.04.sh → folly/build/build-debs-ubuntu-18.04.sh

@@ -13,13 +13,13 @@
 # See the License for the specific language governing permissions and
 # limitations under the License.
 
-# Note: this script was written on Ubuntu 14.04 and will need work in order to
+# Note: this script was written on Ubuntu 18.04 and will need work in order to
 # work on additional platforms. This is left as an exercise for the reader.
 
 set -e
 
 BUILD_DIR=${BUILD_DIR:-_build}
-BOOST_VERSION=${BOOST_VERSION:-1.54.0}
+BOOST_VERSION=${BOOST_VERSION:-1.65.1}
 LIBEVENT_VERSION=${LIBEVENT_VERSION:-2.0-5}
 SSL_VERSION=${SSL_VERSION:-1.0.0}