JSC should use unified sources for platform specific files.

JSC should use unified sources for platform specific files.
https://bugs.webkit.org/show_bug.cgi?id=177290

Reviewed by Michael Saboff.

.:

Change WEBKIT_COMPUTE_SOURCES CMake macro to look for platform
specific unified source lists. This is done in the same way that
we look for port specific configuration files. For example, if I
were building for the Mac port WEBKIT_COMPUTE_SOURCES would add
the Sources.txt and SourcesMac.txt source lists to the list of
unified sources.

* Source/cmake/WebKitMacros.cmake:

Source/JavaScriptCore:

Add a list of platform specific source files and update the
Generate Unified Sources phase of the Xcode build. I skipped WPE
since that seems to have failed for some reason that I didn't
fully understand. See:
https://webkit-queues.webkit.org/results/4611260

Also, fix duplicate symbols in Glib remote inspector files.

* CMakeLists.txt:
* JavaScriptCore.xcodeproj/project.pbxproj:
* PlatformGTK.cmake:
* PlatformMac.cmake:
* SourcesGTK.txt: Added.
* SourcesMac.txt: Added.
* inspector/remote/glib/RemoteInspectorServer.cpp:
(Inspector::RemoteInspectorServer::interfaceInfo):
(Inspector::RemoteInspectorServer::setTargetList):
(Inspector::RemoteInspectorServer::setupInspectorClient):
(Inspector::RemoteInspectorServer::setup):
(Inspector::RemoteInspectorServer::close):
(Inspector::RemoteInspectorServer::connectionClosed):
(Inspector::RemoteInspectorServer::sendMessageToBackend):
(Inspector::RemoteInspectorServer::sendMessageToFrontend):
(Inspector::dbusConnectionCallAsyncReadyCallback): Deleted.

Source/WTF:

The unified source bundler script can now handle more than one
list of sources. Sources will not be bundled across source file
lists. We want to ensure that changing one platform's sources
doesn't break another platform's build, as much as
possible. Additionally, it means that there won't be weird
performance changes when files are added to an unrelated platform.

Remove stale reference to generate-unified-source-bundles.rb script
from Xcode.

* Scripts/generate-unified-source-bundles.rb:
* WTF.xcodeproj/project.pbxproj:

git-svn-id: https://svn.webkit.org/repository/webkit/trunk@222327 268f45cc-cd09-0410-ab3c-d52691b4dbfc