[Bug 734219] textoverlay support forced updating text when new text buffer come

[GStreamer (bugzilla.gnome.org)]

https://bugzilla.gnome.org/show_bug.cgi?id=734219
  GStreamer | gst-plugins-base | git

--- Comment #1 from cjunwang <cjun.wang at samsung.com> 2014-08-06 07:50:11 UTC ---
Created an attachment (id=282639)
 View: https://bugzilla.gnome.org/attachment.cgi?id=282639
 Review: https://bugzilla.gnome.org/review?bug=734219&attachment=282639

add property force-update-text

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