Update gitignore.

Author: timbotimbo

example/.gitignore

@@ -18,7 +18,7 @@
 # The .vscode folder contains launch configuration and tasks you configure in
 # VS Code which you may wish to be included in version control, so this line
 # is commented out by default.
-#.vscode/
+.vscode/
 
 # Flutter/Dart/Pub related
 **/doc/api/
@@ -32,6 +32,10 @@
 /build/
 /windows/unityLibrary
 
+
+**/Flutter/ephemeral
+**/flutter/ephemeral
+
 # Web related
 lib/generated_plugin_registrant.dart