Integrate perlio:

[  9471]
Should be (^O eq 'MSWin32') not 'Win32'
Fail #12 seems real - chdir is in wrong dir.

[  9467]
Skip order test of glob if case-ignoring system cannot
create a.test and A.test

p4raw-link: @9471 on //depot/perlio: 14107c4230ff0dd854afb28ea983f6afcb4bfac1
p4raw-link: @9467 on //depot/perlio: 5f79b44fe88fd23f9e0a19ecd0acb8d38aa1c7e2

p4raw-id: //depot/perl@9472