Update autoprefixer.js with iOS 8, Android 4.4.3 and csso gradient fix
Update autoprefixer.js with iOS 8, Android 4.4.3 and csso gradient fix

ai/autoprefixer-rails,ai/autoprefixer-rails,ipmobiletech/autoprefixer-rails,ai/autoprefixer-rails,glebm/autoprefixer-rails,onelogin/autoprefixer-rails,ai/autoprefixer-rails