Tests: skip proxy_cache_chunked.t on win32.

proxy_cache_chunked.t

diff --git a/proxy_cache_chunked.t b/proxy_cache_chunked.t
index aa8a42a..8e60597 100644
--- a/proxy_cache_chunked.t
+++ b/proxy_cache_chunked.t
@@ -24,6 +24,8 @@
 select STDERR; $| = 1;
 select STDOUT; $| = 1;
 
+plan(skip_all => 'win32') if $^O eq 'MSWin32';
+
 my $t = Test::Nginx->new()->has(qw/http proxy cache/)->plan(2);
 
 $t->write_file_expand('nginx.conf', <<'EOF');