Export ProgramData environment variable to cquery.

This is required for automatic system include directory resolution.

Author: jacobdufault

src/extension.ts

@@ -216,7 +216,9 @@ export function activate(context: ExtensionContext) {
     clientConfig['clientVersion'] = VERSION
     let args = ['--language-server'].concat(clientConfig['launchArgs']);
 
-    let env: any = {};
+    let env: any = {
+      'ProgramData': process.env['ProgramData'],
+    };
     // env.LIBCLANG_LOGGING = '1';
     // env.MALLOC_CHECK_ = '2';