Integrate perlio:

[ 10364]
Cleanup dll.base and dll.exp created by GCC builds.

[ 10363]
Make filecomp test work on CRLF platforms by adding binmode.

p4raw-link: @10364 on //depot/perlio: 562c1c190437b5b6cd7367e07a3dd748f2d9f34f
p4raw-link: @10363 on //depot/perlio: e5a04bd3608b6c4e986b3e42b05c62a441470936

p4raw-id: //depot/perl@10365