skia: compile SkTextBox for Samsung's libtvout
skia: compile SkTextBox for Samsung's libtvout

Change-Id: Ic1fdddbe8c5c41ff2bf7c1b723d054e509a64185

SuperNexus/android_external_skia,SuperNexus/android_external_skia,SuperNexus/android_external_skia,SuperNexus/android_external_skia