Converts line endings in min_unit_test

Using Windows line endings was causing test_Minify_ImportProcessor.php
to fail.

The diff of these files is going to be painful, but I was running min_unit_tests/test_Minify_ImportProcessor.php and the result was a failure. The reason: countBytes() was returning different values for the combo'd files versus the files on disk even though their content was the same. The culprit: line endings.

test_Minify_importProcessor.php now passes unit tests.

I'm fairly new to git, so if there's a less painful way to make this work, I'm happy to help.