Fix vcpkg macos

Author: talregev

.github/workflows/vcpkg.yml

@@ -73,7 +73,7 @@ jobs:
         if: runner.os == 'macOS'
         shell: bash
         run: |
-          brew install autoconf automake autoconf-archive
+          brew install autoconf autoconf-archive automake libtool
 
       - name: "Install dependencies"
         run: >