Debian specific patch to help webpack find sources

--- a/config/webpack.config.js
+++ b/config/webpack.config.js
@@ -11,7 +11,7 @@
 const vendorDllHash = require('./helpers/vendor_dll_hash');
 const createIncrementalWebpackCompiler = require('./helpers/incremental_webpack_compiler');
 
-const ROOT_PATH = path.resolve(__dirname, '..');
+const ROOT_PATH = '/usr/share/gitlab';
 const VENDOR_DLL = process.env.WEBPACK_VENDOR_DLL && process.env.WEBPACK_VENDOR_DLL !== 'false';
 const CACHE_PATH = process.env.WEBPACK_CACHE_PATH || path.join(ROOT_PATH, 'tmp/cache');
 const IS_PRODUCTION = process.env.NODE_ENV === 'production';