[CMake] Make the removal of transitive library dependencies work with CMake < 2.8.7.

[CMake] Make the removal of transitive library dependencies work with CMake < 2.8.7.
https://bugs.webkit.org/show_bug.cgi?id=80469

Reviewed by Antonio Gomes.

.:

* CMakeLists.txt: Do not set the CMAKE_LINK_INTERFACE_LIBRARIES
variable here; it was introduced in CMake 2.8.7 so we can't depend
on it as we actually support CMake >= 2.8.0.

Source/JavaScriptCore:

* CMakeLists.txt: Manually set the LINK_INTERFACE_LIBRARIES target
property on the library being created.

Source/WebCore:

No new tests, this is a buildsystem change.

* CMakeLists.txt: Manually set the LINK_INTERFACE_LIBRARIES target
property on the library being created.

Source/WebKit:

* CMakeLists.txt: Manually set the LINK_INTERFACE_LIBRARIES target
property on the library being created.

Source/WebKit2:

* CMakeLists.txt: Manually set the LINK_INTERFACE_LIBRARIES target
property on the library being created.

git-svn-id: https://svn.webkit.org/repository/webkit/trunk@110024 268f45cc-cd09-0410-ab3c-d52691b4dbfc