Update OpenDebugAD7 reference.

Author: chuckries

src/coreclr-debug/install.ts

@@ -164,7 +164,7 @@ export class DebugInstaller
             dependencies: {
                 "Microsoft.VisualStudio.clrdbg": "14.0.25406-preview-3044032",
                 "Microsoft.VisualStudio.clrdbg.MIEngine": "14.0.30610-preview-1",
-                "Microsoft.VisualStudio.OpenDebugAD7": "1.0.20610-preview-3",
+                "Microsoft.VisualStudio.OpenDebugAD7": "1.0.20614-preview-2",
                 "NETStandard.Library": "1.5.0-rc2-24027",
                 "Newtonsoft.Json": "7.0.1",
                 "Microsoft.VisualStudio.Debugger.Interop.Portable": "1.0.1",