openacc: Add XFAILs [PR98979]

This patch adds some XFAILs for PR98979 until the patch to fix them has
been approved. See:

  https://gcc.gnu.org/pipermail/gcc-patches/2021-February/564711.html

gcc/testsuite/
	PR fortran/98979
	* gfortran.dg/goacc/array-with-dt-2.f90: Add expected errors.
	* gfortran.dg/goacc/derived-chartypes-1.f90: Skip ICEing test.
	* gfortran.dg/goacc/derived-chartypes-2.f90: Likewise.

libgomp/
	PR fortran/98979
	* testsuite/libgomp.oacc-fortran/array-stride-dt-1.f90: Add expected
	errors.

gcc/testsuite/gfortran.dg/goacc/array-with-dt-2.f90

@@ -4,7 +4,8 @@ end type t
 
 type(t), allocatable :: b(:)
 
-!$acc update host(b(::2))
-!$acc update host(b(1)%A(::3,::4))
+! TODO: Remove expected errors when this is supported.
+!$acc update host(b(::2))  ! { dg-error "Stride should not be specified for array section in MAP clause" }
+!$acc update host(b(1)%A(::3,::4))  ! { dg-error "Stride should not be specified for array section in MAP clause" }
 end
 

gcc/testsuite/gfortran.dg/goacc/derived-chartypes-1.f90

@@ -1,3 +1,6 @@
+! This currently ICEs. Avoid that.
+! { dg-skip-if "PR98979" { *-*-* } }
+
 type :: type1
   character(len=35) :: a
 end type type1

gcc/testsuite/gfortran.dg/goacc/derived-chartypes-2.f90

@@ -1,3 +1,6 @@
+! This currently ICEs. Avoid that.
+! { dg-skip-if "PR98979" { *-*-* } }
+
 type :: type1
   character(len=35,kind=4) :: a
 end type type1

libgomp/testsuite/libgomp.oacc-fortran/array-stride-dt-1.f90

@@ -24,8 +24,9 @@ end do
 
 b(1)%A(:,:) = 5
 
-!$acc update device(b(::2))
-!$acc update device(b(1)%A(::3,::4))
+! TODO: Remove expected errors once this is supported.
+!$acc update device(b(::2))  ! { dg-error "Stride should not be specified for array section in MAP clause" }
+!$acc update device(b(1)%A(::3,::4))  ! { dg-error "Stride should not be specified for array section in MAP clause" }
 
 do i=1,20
   !$acc exit data copyout(b(i)%A)