[Command::Spec] Revert template license to MIT (Example)

This is done to prevent an user to indicate the wrong license in the spec.
The linter checks for it and fails the validation if the example keyword is
present.

/c @orta

Gemfile.lock

@@ -7,7 +7,7 @@ GIT
 
 GIT
   remote: https://github.com/CocoaPods/Core.git
-  revision: b56cbd3145fbf97ff9589d70f7bc6f8b88c9a626
+  revision: 92692426f9ed7a5daee4ee1521e47cc716dce3e9
   branch: master
   specs:
     cocoapods-core (0.22.3)
@@ -17,7 +17,7 @@ GIT
 
 GIT
   remote: https://github.com/CocoaPods/Xcodeproj.git
-  revision: da60c7e415f150846d3120e9e3b7310d534446ff
+  revision: 465fd0a975fae85cc621ada84f89cc24f01748ef
   branch: master
   specs:
     xcodeproj (0.8.1)

lib/cocoapods/command/spec.rb

@@ -477,7 +477,7 @@ Pod::Spec.new do |s|
   #  Popular ones are 'MIT', 'BSD' and 'Apache License, Version 2.0'.
   #
 
-  s.license      = 'MIT'
+  s.license      = 'MIT (example)'
   # s.license      = { :type => 'MIT', :file => 'FILE_LICENSE' }