Fix handling of frame position values

Fix handling of frame position values

* src/frame.c (tty_child_pos_param): Handle additional position
values.  New SIZE argument.
(tty_child_frame_rect): Process size before position.
(Fmake_terminal_frame): Do not store calculated size/position
values in parameters to avoid that a negative absolute position
is later interpreted as position relative to bottom/right edge
of parent.
(Fmodify_frame_parameters): For tty child frames process size
before position values so the latter can take a new size into
account.
* src/frame.h: Adjust declaration of tty_child_pos_param.
* src/gtkutil.c (xg_set_geometry): Handle negative frame
position specifications.
* src/msdos.c (IT_set_frame_parameters): For tty child frames
process size before position parameters.
* src/xfns.c (x_window): In the non-GTK toolkit variant leave
negative position values unchanged - the toolkit should know how
to handle them.  Process child frame position parameters
separately.  In the non-toolkit variant process child frame
parameters separately.

(cherry picked from commit cbad6215cf4fef826fa9c3600765a7c696872eaf)