Attempt to fix azure pipeline

azure-pipelines.yml

@@ -8,6 +8,11 @@ steps:
     echo "##vso[task.prependpath]$HOME/.cargo/bin"
   displayName: 'Install Rust'
 
+- script: |
+    apt-get update
+    apt-get install -y libmysql++-dev
+  displayName: Install libmysql
+
 - script: |
     rustc -Vv
     cargo -V