[CMake] Create targets before WEBKIT_INCLUDE_CONFIG_FILES_IF_EXISTS is called

[CMake] Create targets before WEBKIT_INCLUDE_CONFIG_FILES_IF_EXISTS is called
https://bugs.webkit.org/show_bug.cgi?id=174557

Reviewed by Michael Catanzaro.

.:

* Source/cmake/WebKitMacros.cmake:

Source/JavaScriptCore:

* CMakeLists.txt:

Source/WebCore:

No new tests needed.

* CMakeLists.txt:

Source/WebCore/PAL:

No new tests needed.

* pal/CMakeLists.txt:

Source/WebKit:

* CMakeLists.txt:

Source/WebKitLegacy:

* CMakeLists.txt:

Source/WTF:

* wtf/CMakeLists.txt:

git-svn-id: https://svn.webkit.org/repository/webkit/trunk@219560 268f45cc-cd09-0410-ab3c-d52691b4dbfc