pass .packages path to snapshot invocation (#34517)

diff --git a/bin/flutter.bat b/bin/flutter.bat
index 4547692..b53961c 100644
--- a/bin/flutter.bat
+++ b/bin/flutter.bat
@@ -177,7 +177,7 @@
 REM Do not use the CALL command in the next line to execute Dart. CALL causes
 REM Windows to re-read the line from disk after the CALL command has finished
 REM regardless of the ampersand chain.
-"%dart%" %FLUTTER_TOOL_ARGS% "%snapshot_path%" %* & exit /B !ERRORLEVEL!
+"%dart%" --packages="%flutter_tools_dir%\.packages" %FLUTTER_TOOL_ARGS% "%snapshot_path%" %* & exit /B !ERRORLEVEL!
 
 :final_exit
 EXIT /B %exit_code%