Create CI resources directory

Add a new directory "ci", to easily add new tests with setup/run phases
that don't require direct setup in .travis.yml. This also avoids
polution of scripts/.

Signed-off-by: Fabio Utzig <utzig@apache.org>
diff --git a/ci/sim_install.sh b/ci/sim_install.sh
new file mode 100755
index 0000000..b9a4cae
--- /dev/null
+++ b/ci/sim_install.sh
@@ -0,0 +1,17 @@
+#!/bin/bash -x
+
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#     http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+
+pushd sim && cargo fetch
+[[ $? -ne 0 ]] && exit 1
+popd