[EFL][WK2] Compile webkit1 and webkit2 by default.
https://bugs.webkit.org/show_bug.cgi?id=85041

Patch by Mariusz Grzegorczyk <mariusz.g@samsung.com> on 2012-06-06
Reviewed by Chang Shu.

Compile webkit1 and webkit2 while running Tools/Scripts/build-webkit --efl.
Webkit2 build can be skipped by adding --no-webkit2 option to build-webkit script.

* Scripts/build-webkit:

git-svn-id: svn://svn.chromium.org/blink/trunk@119678 bbb929c8-8fbe-4397-9dbb-9b2b20218538