add scripts for installing system dependencies and running tests

Summary:
It's convenient to use the Watchman Vagrant VMs to investigate test
failures and builds that otherwise can't be reproduced locally. To
make that even easier, add a script for installing system package
dependencies (so autogen.sh is fast) and a script for running the test
suite.

Reviewed By: genevievehelsel

Differential Revision: D36534190

fbshipit-source-id: 935416fc11db8454f5a715bd74d457424ddfec21

Author: chadaustin

autogen.sh

@@ -5,6 +5,8 @@
 # This source code is licensed under the MIT license found in the
 # LICENSE file in the root directory of this source tree.
 
+cd "$(dirname "$0")"
+
 set -x
 PREFIX=${PREFIX:-/usr/local}
 python3 build/fbcode_builder/getdeps.py build \

install-system-packages.sh

@@ -0,0 +1,9 @@
+#!/bin/bash -e
+# vim:ts=2:sw=2:et:
+# Copyright (c) Meta Platforms, Inc. and affiliates.
+#
+# This source code is licensed under the MIT license found in the
+# LICENSE file in the root directory of this source tree.
+
+set -x
+python3 "$(dirname "$0")/build/fbcode_builder/getdeps.py" install-system-deps --recursive watchman

run-tests.sh

@@ -0,0 +1,9 @@
+#!/bin/bash -e
+# vim:ts=2:sw=2:et:
+# Copyright (c) Meta Platforms, Inc. and affiliates.
+#
+# This source code is licensed under the MIT license found in the
+# LICENSE file in the root directory of this source tree.
+
+set -x
+python3 "$(dirname "$0")/build/fbcode_builder/getdeps.py" test --allow-system-packages --no-testpilot watchman