add install script for installing mvfst
ADD
install.sh
+#!/bin/bash -eu
+
+# Copyright (c) Facebook, Inc. and its affiliates.
+#
+# This source code is licensed under the MIT license found in the
+# LICENSE file in the root directory of this source tree.
+
+## Run this script to (re)install mvfst and its dependencies (fizz
+## and folly). You must first compile all the dependencies before running this. This
+## Usually this is done by first running `build_helper.sh`.
+
+set -e
+start_dir=$(pwd)
+trap 'cd $start_dir' EXIT
+
+# Must execute from the directory containing this script
+cd "$(dirname "$0")"
+
+cd _build
+# Uninstall is expected to fail the first time
+sudo make uninstall || true
+sudo make install
+
+# Make sure the libraries are available
+# Linux only
+sudo /sbin/ldconfig || true

add install script for installing mvfst

Reviewed By: mjoras

Differential Revision: D19914554

fbshipit-source-id: e1ee1c26849378cb6b27a4d4a889e86b5e1f06ad