Really add testsuite/gfortran.dg/coarray_31.f90, which should be in commit Rev.

Really add testsuite/gfortran.dg/coarray_31.f90, which should be
in commit Rev. 201140.

From-SVN: r201142

gcc/testsuite/gfortran.dg/coarray_31.f90

+! { dg-do compile }
+! { dg-options "-fdump-tree-original -fcoarray=single" }
+!
+! PR fortran/57906
+! PR fortran/52052
+!
+type t
+  integer, allocatable :: x(:)[:]
+  class(*), allocatable :: z(:)[:]
+  class(*), allocatable :: d[:]
+end type t
+type t2
+  type(t) :: y
+end type t2
+type(t2) :: a, b
+a = b
+end
+
+! { dg-final { scan-tree-dump "a.y.x.data = D.\[0-9\]+.y.x.data;" "original" } }
+! { dg-final { scan-tree-dump "a.y.z._data.data = D.\[0-9\]+.y.z._data.data;" "original" } }
+! { dg-final { scan-tree-dump "a.y.d._data.data = D.\[0-9\]+.y.d._data.data;" "original" } }
+! { dg-final { cleanup-tree-dump "original" } }