[Speech] Add IVI Speech API support

Adding the synthesizer/vocalizer part for now.
Will add the recognition later.
Add wayland library as explicit package dependency for system-info extension

BUG=https://crosswalk-project.org/jira/browse/XWALK-1381

Signed-off-by: Baptiste DURAND <baptiste.durand@open.eurogiciel.org>
[gyp] Build filesystem for Tizen only
Merge pull request #279 from eurogiciel-oss/XWALK-1381

Add wayland library as explicit package dependency for system-info exten...
Merge pull request #280 from halton/master

[gyp] Build filesystem for Tizen only
Bump version to 0.46
Merge pull request #273 from mrunalk/speech_api

[Speech] Add IVI Speech API support
Bump version to 0.47
[Download] enable build for all tizen platforms

replace '_mobile' suffix by '_tizen' in order to
also support IVI platform.

BUG=XWALK-1070
Merge pull request #288 from eurogiciel-oss/download_XWALK-1070

[Download] enable build for all tizen platforms
Bump version to 0.48
Merge pull request #286 from seanlong/app_dev

[Application] Add application context, kill, launch and events support
[Application] Add current application exit/hide support

The supported APIs are listed below:
Application.hide/exit

The implementation leverages running application object exported by the runtime
process on the DBus session. The "Terminate" and "Exit" methods of it only
permit the launcher process to access.