Add missing gnupg dependency.
Otherwise it doesn't work in a Ubuntu docker container.
RELNOTES: None
Closes
@@ -32,7 +32,7 @@ Bazel comes with two completion scripts. After installing Bazel, you can:
**Note:** This is a one-time setup step.
```bash
-sudo apt install curl
+sudo apt install curl gnupg
curl https://bazel.build/bazel-release.pub.gpg | sudo apt-key add -
echo "deb [arch=amd64] https://storage.googleapis.com/bazel-apt stable jdk1.8" | sudo tee /etc/apt/sources.list.d/bazel.list
```
