Update .gitignore from ejected project

[pedrouid]

Can't find where to add this but it would be great to include this on the .gitignore generated from eject script. Specially the Xcode files which have changes on every commit.

# See https://help.github.com/ignore-files/ for more about ignoring files.

# OSX
#
.DS_Store

# expo
#
.expo/

# node.js
#
node_modules/
npm-debug.log*
yarn-debug.log*
yarn-error.log*

# Xcode
#
build/
*.pbxuser
!default.pbxuser
*.mode1v3
!default.mode1v3
*.mode2v3
!default.mode2v3
*.perspectivev3
!default.perspectivev3
xcuserdata
*.xccheckout
*.moved-aside
DerivedData
*.hmap
*.ipa
*.xcuserstate
project.xcworkspace

# Android/IntelliJ
#
build/
.idea
.gradle
local.properties
*.iml

# BUCK
#
buck-out/
\.buckd/
*.keystore

# misc
#
.env.local
.env.development.local
.env.test.local
.env.production.local

# fastlane
#
*/fastlane/report.xml
*/fastlane/Preview.html
*/fastlane/screenshots

# Bundle artifact
#
*.jsbundle