[Android] Add icudtl.dat into xwalk_core_library

It's needed after rebase to chromium 35.

BUG=https://crosswalk-project.org/jira/browse/XWALK-1389
[Android] Restore the function for '--icon'.

This patch is to restore the function for '--icon'.
If the developer specify the icon in the command line, this icon
will be used instead of the icons in manifest.json.

BUG=https://crosswalk-project.org/jira/browse/XWALK-1368
[Application][Tizen] Move extension process logic to a standalone thread

The previous EP(ExtensionProcess) & launcher merge patch changed the launcher's
main thread glib message loop to Chromium message loop which is MessagePumpOzone
in Tizen. This leads to some asynchronous DBus function and signals cannot be
successfully called.

To divide the old launcher logic(mainly communicate with DBus) and new EP
logic this patch added a new XWalkLauncherExtensionService running in a separate
thread.
Update README.md
Merge pull request #1817 from seanlong/launcher_ep_service

[Application][Tizen] Move extension process logic to a standalone thread
Bump version to 6.35.119.0
Merge branch 'master' of github.com-crosswalk:crosswalk-project/crosswalk
[Android] Enable app cache on Android by default

Currently, app cache flag is enabled by default, but it can't work if
app cache path is not set explicitly. Actually, Chromium doesn't explore
the interface to setting app cache directory.

Crosswalk should not have this limitation, when no app cache is specified,
we should use chromium default cache path instead.

BUG=https://crosswalk-project.org/jira/browse/XWALK-1355
Merge pull request #1816 from yinli/app_cache_enable

[Android] Enable app cache on Android by default
Merge pull request #1811 from wang16/library_m35

[Android] Add icudtl.dat into xwalk_core_library
Bump version to 6.35.120.0
Merge pull request #1799 from wuhengzhi/multi_icon_refine

[Android] Restore the function for '--icon'.