WebKit.xcworkspace should be be able to build iOS platforms

WebKit.xcworkspace should be be able to build iOS platforms
https://bugs.webkit.org/show_bug.cgi?id=148881

Reviewed by Daniel Bates.

Since we don't want to create platform-specific schemes, all projects in the workspace's schemes need to build
for all supported platforms.

.:

* WebKit.xcworkspace/xcshareddata/xcschemes/All Tools.xcscheme: Removed the DumpRenderTree target since its All
target was already included. Removed the WebKitTestRunner target and replaced it with its All target.

Source/WebInspectorUI:

* Configurations/Base.xcconfig: Included iphoneos and iphonesimulator in SUPPORTED_PLATFORMS.
* Configurations/WebInspectorUIFramework.xcconfig: Skipped installing on iOS.

Tools:

* MiniBrowser/Configurations/Base.xcconfig: Included iphoneos and iphonesimulator in SUPPORTED_PLATFORMS.
* MiniBrowser/Configurations/MiniBrowser.xcconfig: Excluded all source files on iOS, and linked Cocoa and WebKit on Mac.
* MiniBrowser/Configurations/MiniBrowserBundle.xcconfig: Ditto.
* MiniBrowser/MiniBrowser.xcodeproj/project.pbxproj: Stopped linking frameworks in Link Binaries With Libraries.

git-svn-id: https://svn.webkit.org/repository/webkit/trunk@189462 268f45cc-cd09-0410-ab3c-d52691b4dbfc