[tools] winetest: Add a script to test HTTP redirection limits.

[Owen Rudge]

I've written patches to implement support for 
WINHTTP_OPTION_MAX_HTTP_AUTOMATIC_REDIRECTS in winhttp; this script will 
be required for the tests.

Signed-off-by: Owen Rudge <orudge(a)codeweavers.com>
---
  winetest/tests/redirecttest.php | 17 +++++++++++++++++
  1 file changed, 17 insertions(+)
  create mode 100644 winetest/tests/redirecttest.php