Show a message and cause the build to immediately fail when any .vsprops files are...

Show a message and cause the build to immediately fail when any .vsprops files are copied

When $WebKitLibrariesDir is set to a non-standard location, the
.vsprops files have to be copied from WebKitLibraries/win to
$WebKitLibrariesDir. When this happens, Visual Studio doesn't pick up
changes to the .vsprops files until the next time it opens the solution
file. Before this patch, the build would soldier on with the old
.vsprops files, leading to strange build failures. Now we detect that
the .vsprops files have been updated, display a message to the user
telling them what to do, and make the build fail immediately.

Fixes <http://webkit.org/b/49181> Windows build fail mysteriously when
.vsprops files are updated

Reviewed by Steve Falkenburg.

JavaScriptCore:

* JavaScriptCore.vcproj/JavaScriptCore/JavaScriptCoreGenerated.make:
Moved code to copy the tools directory to the new copy-tools.cmd
script. Moved that after the command that writes the buildfailed file
so the build will be considered a failure if copy-tools.cmd fails.
Changed to write the project name into buildfailed like all our other
projects do, so those other projects will know that the failure was due
to this project.

* JavaScriptCore.vcproj/JavaScriptCore/JavaScriptCoreGenerated.vcproj:
Added new scripts.

* JavaScriptCore.vcproj/JavaScriptCore/copy-tools.cmd: Added. Copies
the tools directory to $WebKitLibrariesDir. If any files were copied,
we display a message to the user and exit with error code 1 to cause
the build to fail. In non-interactive builds, we just print the message
to the build log. In interactive builds, we show the message in an
alert.

* JavaScriptCore.vcproj/JavaScriptCore/show-alert.js: Added. Uses
Windows Scripting Host to display a message in an alert.

WebKitTools:

Mark Windows builds triggered from Perl as being non-interactive

This affects whether some of our scripts will show alerts vs. printing
to the build log.

* Scripts/webkitdirs.pm:
(buildVisualStudioProject): Set WEBKIT_NONINTERACTIVE_BUILD to 1.

git-svn-id: https://svn.webkit.org/repository/webkit/trunk@71532 268f45cc-cd09-0410-ab3c-d52691b4dbfc