[chromium] make case of npTestNetscapePlugIn.dll match case in copy rule

[chromium] make case of npTestNetscapePlugIn.dll match case in copy rule
https://bugs.webkit.org/show_bug.cgi?id=85083

Patch by Scott Graham <scottmg@chromium.org> on 2012-04-27
Reviewed by Dirk Pranke.

Make output product_name for npTestNetscapePlugIn.dll match the case
of the copy_TestNetscapePlugIn rule. This is required for ninja, which
is more particular about case matching in rules than the VS build.

* DumpRenderTree/DumpRenderTree.gyp/DumpRenderTree.gyp:

git-svn-id: http://svn.webkit.org/repository/webkit/trunk@115500 268f45cc-cd09-0410-ab3c-d52691b4dbfc