Upgrade Firecracker from 0.21.0 to master

Kazuyoshi Kato · Kazuyoshi Kato · commit a81f236a212b · 2020-08-11T09:58:18.000-07:00
Signed-off-by: Kazuyoshi Kato &lt;katokazu@amazon.com&gt;
diff --git a/_submodules/firecracker b/_submodules/firecracker
@@ -1 +1 @@
-Subproject commit 5f1b6767670bb424e0bcb9971d8a9ab85fd6562d
+Subproject commit 1ee9e936537b950452eb75fc22a9c4301783b7f3
diff --git a/tools/docker/Dockerfile.firecracker-builder b/tools/docker/Dockerfile.firecracker-builder
@@ -11,7 +11,10 @@
 # express or implied. See the License for the specific language governing
 # permissions and limitations under the License.
 
-FROM rust:1.39-stretch
+# Firecracker tends to use latest Rust versions.
+# The Rust version below should be matched with
+# https://github.com/firecracker-microvm/firecracker/blob/master/tools/devctr/Dockerfile.x86_64.
+FROM rust:1.43.1-buster
 
 ENV DEBIAN_FRONTEND="noninteractive"
 RUN apt-get update && apt-get install --yes --no-install-recommends \
