Canonicalize line breaks in input sources.
Canonicalize line breaks in input sources.

This fixes cases where tsickle tests for `something\n`, missing the \r bit.

drjanitor/tsickle,alexeagle/tsickle,ncfxy/tsickle,ncfxy/tsickle,drjanitor/tsickle,lucidsoftware/tsickle,lucidsoftware/tsickle,drjanitor/tsickle,angular/tsickle,alexeagle/tsickle,drjanitor/tsickle,alexeagle/tsickle,ncfxy/tsickle,angular/tsickle,lucidsoftware/tsickle