Check out submodules in Azure

.azure-pipelines.yml

@@ -23,6 +23,7 @@ jobs:
 
   steps:
     - checkout: self
+      submodules: true
     - script: |
         curl https://sh.rustup.rs -sSf | sh -s -- -y --default-toolchain $RUSTUP_TOOLCHAIN
         echo "##vso[task.setvariable variable=PATH;]$PATH:$HOME/.cargo/bin"
@@ -38,6 +39,8 @@ jobs:
         rustc --version
       displayName: Install rust (Win)
       condition: eq( variables['Agent.OS'], 'Windows_NT' )
+    - script: rustup target add wasm32-wasi
+      displayName: Install wasm32-wasi target
     - script: |
         powershell -Command "$ProgressPreference = 'SilentlyContinue'; iwr -outf %TEMP%\LLVM-8.0.0-win64.exe https://rust-lang-ci2.s3.amazonaws.com/rust-ci-mirror/LLVM-8.0.0-win64.exe"
         %TEMP%\LLVM-8.0.0-win64.exe /S /NCRC