calling cygwin_package always reinstalls that package

[ezray]

The not_if guards in providers/package.rb are incorrect. The clause is being evaluated as a string, not being executed. This results in the not_if guard always returning false, which causes the package in question to be reinstalled every time Chef is run. I believe the lines should look something like:

not_if { `#{node['cygwin']['home']}/bin/cygcheck -c #{new_resource.name}"`.include? "OK" }