Merge pull request #8054 from lilliputten/win-build

Generate correct includes list for `build-index` script on windows hosts.

tasks/generate-index.js

@@ -20,9 +20,10 @@ function getSymbols(callback) {
   });
 }
 
+const srcPath = path.posix.resolve(__dirname, '../src').replace(/\\/g, '/');
 function getPath(name) {
   const fullPath = require.resolve(path.resolve('src', name));
-  return './' + path.posix.relative('src/', fullPath);
+  return './' + path.posix.relative(srcPath, fullPath.replace(/\\/g, '/'));
 }
 
 /**