[EFL] Enable support for HTML5 datalist

[EFL] Enable support for HTML5 datalist
https://bugs.webkit.org/show_bug.cgi?id=90157

Patch by Christophe Dumez <christophe.dumez@intel.com> on 2012-06-28
Reviewed by Martin Robinson.

.:

Turn on DATALIST flag by default on EFL port to
support HTML5 datalist tag.

* Source/cmake/OptionsEfl.cmake:

Tools:

Turn on DATALIST flag by default on EFL port to
support HTML5 datalist tag.

* Scripts/webkitperl/FeatureList.pm:

LayoutTests:

* platform/efl/Skipped: Unskip fast/forms/datalist tests now that
the DATALIST flag is turned on by default on EFL port.
* platform/efl/fast/forms/datalist/input-list-expected.txt: Added.
We need platform-specific result because we don't support datalist
UI for any element yet. This should be progressively added later
on and the expected result will evolve.

git-svn-id: https://svn.webkit.org/repository/webkit/trunk@121468 268f45cc-cd09-0410-ab3c-d52691b4dbfc