Remove graphics.c; add line to recovery.rc.

The custom graphics.c was not much different from (actually,
functionally identical to) bootable/recovery/minui/graphics.c. Hence,
just specify the appropriate C flag and use that and try.

Change-Id: I827e414ec85d8d3ccfaa9f33f3cc57015113e22d
Signed-off-by: angelsl <hidingfromhidden@gmail.com>