[EFL] Share resources installed for inspector

[EFL] Share resources installed for inspector
https://bugs.webkit.org/show_bug.cgi?id=98991

Reviewed by Gyuyoung Kim.

.:

Now, WebKit1/Efl and WebKit2/Efl install same resources to different directory
when INSPECTOR is enabled.

This patch changes to install resources one time and share it.

* Source/PlatformEfl.cmake:
Extracted build scripts which install resources from WebKit/PlatformEfl.cmake.
* Source/cmake/OptionsEfl.cmake:

Source/WebKit:

* PlatformEfl.cmake:
Extracted build scripts which install resources to WebKit/PlatformEfl.cmake.

Source/WebKit2:

* PlatformEfl.cmake: Removed build script which install resources to share.
* UIProcess/efl/WebInspectorProxyEfl.cpp:
(WebKit::WebInspectorProxy::inspectorPageURL): Modified not to use makeString.
(WebKit::WebInspectorProxy::inspectorBaseURL): Changed resource path.

git-svn-id: https://svn.webkit.org/repository/webkit/trunk@131189 268f45cc-cd09-0410-ab3c-d52691b4dbfc