Add registry keys to ensure XHR tests can find Perl

[rkirsling]

(From https://bugs.webkit.org/show_bug.cgi?id=188039.)

90 tests under http/tests/xmlhttprequest fail if Perl can't be located.

Solution:

reg add HKEY_CLASSES_ROOT\.pl\Shell\ExecCGI\Command /ve /d "C:\tools\perl\perl\bin\perl.exe -T"
reg add HKEY_CLASSES_ROOT\.cgi\Shell\ExecCGI\Command /ve /d "C:\tools\perl\perl\bin\perl.exe -T"

[donny-dont]

Believe this is fixed now in 743a9a2

[fujii]

Reopen this issue. It is not fixed yet. You set values to wrong registry paths. Use ｀(Default)｀ http://powershelleverydayfaq.blogspot.com/2012/08/how-to-work-with-registry-default-values.html

[donny-dont]

This is fixed in WebKitForWindows/powershell-webkit-dev@7911b33 based on above comment.