Pre-load resolver library before faking.

This is to avoid error ```cannot load such file -- win32/resolv``` when it is required later on.

This solves issue https://github.com/tjschuck/rake-compiler-dev-box/issues/5

Important: The patch will not have any effect, until the ```fake.rb``` files in the build directory were deleted (or alternatively the full build directory cleared). Only then rake-compiler installs a version of ```fake.rb``` with this fix.