vcl: gtk3: GTK_STYLE_CLASS_LABEL requires 3.16
vcl: gtk3: GTK_STYLE_CLASS_LABEL requires 3.16

Change-Id: Ic6701e391525ed837fbd7f015025ccc5c345caec

JurassicWordExcel/core,JurassicWordExcel/core,JurassicWordExcel/core,JurassicWordExcel/core,JurassicWordExcel/core,JurassicWordExcel/core,JurassicWordExcel/core,JurassicWordExcel/core,JurassicWordExcel/core,JurassicWordExcel/core