Dockerized LLVM (#1914)

Optionally build with dockererized custom llvm

sdk/docker-solana/build.sh

@@ -0,0 +1,43 @@
+#!/usr/bin/env bash
+set -ex
+
+cd "$(dirname "$0")"
+eval "$(../channel-info.sh)"
+
+if [[ $BUILDKITE_BRANCH = "$STABLE_CHANNEL" ]]; then
+  CHANNEL=stable
+elif [[ $BUILDKITE_BRANCH = "$EDGE_CHANNEL" ]]; then
+  CHANNEL=edge
+elif [[ $BUILDKITE_BRANCH = "$BETA_CHANNEL" ]]; then
+  CHANNEL=beta
+fi
+
+if [[ -z $CHANNEL ]]; then
+  echo Unable to determine channel to publish into, exiting.
+  exit 0
+fi
+
+rm -rf usr/
+../../ci/docker-run.sh solanalabs/rust:1.30.1 bash -c "
+  set -ex
+  cargo install --path drone --root sdk/docker-solana/usr
+  cargo install --path . --root sdk/docker-solana/usr
+"
+cp -f entrypoint.sh usr/bin/solana-entrypoint.sh
+../../scripts/install-native-programs.sh usr/bin/
+
+docker build -t solanalabs/solana:$CHANNEL .
+
+maybeEcho=
+if [[ -z $CI ]]; then
+  echo "Not CI, skipping |docker push|"
+  maybeEcho="echo"
+else
+  (
+    set +x
+    if [[ -n $DOCKER_PASSWORD && -n $DOCKER_USERNAME ]]; then
+      echo "$DOCKER_PASSWORD" | docker login --username "$DOCKER_USERNAME" --password-stdin
+    fi
+  )
+fi
+$maybeEcho docker push solanalabs/solana:$CHANNEL