(Qicon_name): New variable.

(Qicon_name): New variable.
(Fx_create_frame): Look for icon-name parm and set icon_label field.
(x_set_icon_type): Compute arg to x_text_icon
based on frame name and icon_name fields.
(x_set_icon_name): New function.
(x_icon): Call x_text_icon.
(x_set_name): Look at icon_name field when setting the icon name,
(x_frame_parms): Add icon-name.
(syms_of_xfns): Set up Qicon_name.