Update the Xcode project name from WebKit to WebKitLegacy.

Update the Xcode project name from WebKit to WebKitLegacy.
https://bugs.webkit.org/show_bug.cgi?id=174162
rdar://problem/33137594

Reviewed by Dan Bernstein.

Rename WebKit to WebKitLegacy.

.:

* WebKit.xcworkspace/contents.xcworkspacedata:
* WebKit.xcworkspace/xcshareddata/xcschemes/All Source.xcscheme:

Source/WebKitLegacy:

* WebKitLegacy.xcodeproj/project.pbxproj: Renamed from Source/WebKitLegacy/WebKit.xcodeproj/project.pbxproj.

git-svn-id: https://svn.webkit.org/repository/webkit/trunk@219484 268f45cc-cd09-0410-ab3c-d52691b4dbfc