undo CL 77050045 / 073d79675aae
undo CL 77050045 / 073d79675aae

Breaks all builds.

««« original CL description
cmd/gc: Add tests for self-referential array types.

LGTM=gri, iant
R=gri, iant
CC=golang-codereviews
https://codereview.appspot.com/77050045
»»»

TBR=cmang
R=cmang
CC=golang-codereviews
https://codereview.appspot.com/77210043

h8liu/golang,h8liu/golang,h8liu/golang,h8liu/golang,h8liu/golang,h8liu/golang,h8liu/golang