fix the mysql2 gem to ~> 0.3.11

Gemfile

@@ -27,7 +27,7 @@ group :test do
 
   platforms :ruby do
     gem 'pg'
-    gem 'mysql2'
+    gem 'mysql2', ~> '0.3.11'
   end
 
   platforms :jruby do

gemfiles/Gemfile.rails3.2

@@ -27,7 +27,7 @@ group :test do
 
   platforms :ruby do
     gem 'pg'
-    gem 'mysql2'
+    gem 'mysql2', ~> '0.3.11'
   end
 
   platforms :jruby do
@@ -35,4 +35,4 @@ group :test do
     gem 'jdbc-sqlite3'
     gem 'activerecord-jdbcpostgresql-adapter'
   end
-end
\ No newline at end of file
+end

gemfiles/Gemfile.rails4.1

@@ -27,7 +27,7 @@ group :test do
 
   platforms :ruby do
     gem 'pg'
-    gem 'mysql2'
+    gem 'mysql2', ~> '0.3.11'
   end
 
   platforms :jruby do

gemfiles/Gemfile.ruby1.9.3

@@ -9,7 +9,7 @@ group :development, :test do
   gem 'rails'
   gem 'sqlite3'
   gem 'pg'
-  gem 'mysql2'
+  gem 'mysql2', ~> '0.3.11'
 
   # i18n gem >=0.7.0 does not work with Ruby 1.9.2
   gem 'i18n', '0.6.1'