[EFL] Add and use run-with-jhbuild and update-webkitefl-libs scripts for EFL

[EFL] Add and use run-with-jhbuild and update-webkitefl-libs scripts for EFL
https://bugs.webkit.org/show_bug.cgi?id=79904

build-webkit --efl will use jhbuild for fetching and building dependencies.

Patch by Dominik Röttsches <dominik.rottsches@linux.intel.com> on 2012-03-17
Reviewed by Gustavo Noronha Silva.

* Scripts/update-webkitefl-libs: Added.
* Scripts/webkitdirs.pm:
(jhbuildWrapperPrefixIfNeeded):
(generateBuildSystemFromCMakeProject):
(buildCMakeGeneratedProject):
* efl/common.py: Added.
(script_path):
(top_level_path):
(number_of_cpus):
* efl/jhbuild.modules: Added.
* efl/jhbuildrc: Added.
* efl/run-with-jhbuild: Added.

git-svn-id: https://svn.webkit.org/repository/webkit/trunk@111115 268f45cc-cd09-0410-ab3c-d52691b4dbfc