[Win] Move Windows build target to Windows 7 (or newer)

[Win] Move Windows build target to Windows 7 (or newer)
https://bugs.webkit.org/show_bug.cgi?id=144890
<rdar://problem/20707307>

Reviewed by Anders Carlsson.

Update linked SDK and minimal Windows level to be compatible with
Windows 7 or newer.

Source/JavaScriptCore:

* JavaScriptCore.vcxproj/JavaScriptCore.vcxproj:
* JavaScriptCore.vcxproj/JavaScriptCore.vcxproj.filters:
* JavaScriptCore.vcxproj/JavaScriptCoreGenerated.vcxproj:
* JavaScriptCore.vcxproj/LLInt/LLIntAssembly/LLIntAssembly.vcxproj:
* JavaScriptCore.vcxproj/LLInt/LLIntDesiredOffsets/LLIntDesiredOffsets.vcxproj:
* JavaScriptCore.vcxproj/LLInt/LLIntOffsetsExtractor/LLIntOffsetsExtractor.vcxproj:
* JavaScriptCore.vcxproj/jsc/jsc.vcxproj:
* JavaScriptCore.vcxproj/jsc/jscLauncher.vcxproj:
* JavaScriptCore.vcxproj/libllvmForJSC/libllvmForJSC.vcxproj:
* JavaScriptCore.vcxproj/testRegExp/testRegExp.vcxproj:
* JavaScriptCore.vcxproj/testRegExp/testRegExpLauncher.vcxproj:
* JavaScriptCore.vcxproj/testapi/testapi.vcxproj:
* JavaScriptCore.vcxproj/testapi/testapiLauncher.vcxproj:
* config.h:

Source/ThirdParty:

* gtest/msvc/gtest-md.vcxproj:

Source/ThirdParty/ANGLE:

* ANGLE.vcxproj/libEGL.vcxproj:
* ANGLE.vcxproj/libGLESv2.vcxproj:
* ANGLE.vcxproj/preprocessor.vcxproj:
* ANGLE.vcxproj/translator_common.vcxproj:
* ANGLE.vcxproj/translator_glsl.vcxproj:
* ANGLE.vcxproj/translator_hlsl.vcxproj:

Source/WebCore:

* WebCore.vcxproj/WebCore.vcxproj:
* WebCore.vcxproj/WebCoreGenerated.vcxproj:
* WebCore.vcxproj/WebCoreTestSupport.vcxproj:
* WebCorePrefix.h:
* config.h:
* testing/js/WebCoreTestSupportPrefix.h:

Source/WebInspectorUI:

* WebInspectorUI.vcxproj/WebInspectorUI.vcxproj:

Source/WebKit:

* WebKit.vcxproj/Interfaces/Interfaces.vcxproj:
* WebKit.vcxproj/WebKit/WebKit.vcxproj:
* WebKit.vcxproj/WebKitGUID/WebKitGUID.vcxproj:

Source/WebKit/win:

* WebKitPrefix.h:

Source/WTF:

* WTF.vcxproj/WTF.vcxproj:
* WTF.vcxproj/WTFGenerated.vcxproj:
* config.h:

Tools:

* DumpRenderTree/DumpRenderTree.vcxproj/DumpRenderTree/DumpRenderTree.vcxproj:
* DumpRenderTree/DumpRenderTree.vcxproj/DumpRenderTree/DumpRenderTreeLauncher.vcxproj:
* DumpRenderTree/DumpRenderTree.vcxproj/ImageDiff/ImageDiff.vcxproj:
* DumpRenderTree/DumpRenderTree.vcxproj/ImageDiff/ImageDiffLauncher.vcxproj:
* DumpRenderTree/DumpRenderTree.vcxproj/TestNetscapePlugin/TestNetscapePlugin.vcxproj:
* DumpRenderTree/config.h:
* TestWebKitAPI/TestWebKitAPI.vcxproj/TestWebKitAPI.vcxproj:
* WinLauncher/WinLauncher.vcxproj/WinLauncher.vcxproj:
* WinLauncher/WinLauncher.vcxproj/WinLauncherLib.vcxproj:
* WinLauncher/stdafx.h:

git-svn-id: https://svn.webkit.org/repository/webkit/trunk@184137 268f45cc-cd09-0410-ab3c-d52691b4dbfc