contrib: Add script to bring up local cilium-agent

Signed-off-by:  <thomas@cilium.io>

contrib/scripts/cilium-up.sh

@@ -0,0 +1,23 @@
+#!/usr/bin/env bash
+
+dir=$(cd $(dirname ${BASH_SOURCE})/../.. && pwd)
+
+function cleanup {
+	killall -9 cilium-docker 2> /dev/null
+	killall -9 cilium-agent 2> /dev/null
+}
+
+trap cleanup EXIT
+cleanup
+
+if [ -z $(which clang) ]; then
+	echo "Looking for LLVM installation..."
+	llvm_dir=$($dir/contrib/scripts/find-llvm.sh)
+	echo "Adding $llvm_dir/bin to PATH"
+	export PATH="$llvm_dir/bin:$PATH"
+fi
+
+sleep 3s
+
+$dir/plugins/cilium-docker/cilium-docker&
+$dir/daemon/cilium-agent $*