Skip EM specs on Windows

Author: sodabrew

Gemfile

@@ -13,6 +13,7 @@ end
 
 group :development do
   gem 'pry'
+  gem 'eventmachine' unless RUBY_PLATFORM =~ /mswin|mingw/
 end
 
 platforms :rbx do

mysql2.gemspec

@@ -15,7 +15,6 @@ Gem::Specification.new do |s|
   s.test_files = `git ls-files spec examples`.split
 
   # tests
-  s.add_development_dependency 'eventmachine'
   s.add_development_dependency 'rake-compiler', '~> 0.8.1'
   s.add_development_dependency 'rake', '~> 0.9.3'
   s.add_development_dependency 'rspec', '~> 2.8.0'