Update .gitignore

Author: Ali Abdelfattah

.gitignore

@@ -36,8 +36,8 @@ coverage/
 **/android/**/gradle-wrapper.jar
 **/android/.gradle
 **/android/captures/
-**/android/gradlew
-**/android/gradlew.bat
+android/gradlew
+android/gradlew.bat
 **/android/local.properties
 **/android/**/GeneratedPluginRegistrant.java
 
@@ -74,4 +74,4 @@ coverage/
 !**/ios/**/default.mode2v3
 !**/ios/**/default.pbxuser
 !**/ios/**/default.perspectivev3
-!/packages/flutter_tools/test/data/dart_dependencies_test/**/.packages
+!/packages/flutter_tools/test/data/dart_dependencies_test/**/.packages