d: Call the assertp and boundsp variants for assert and array contract failures.

gcc/d/ChangeLog:

	* d-codegen.cc: Include dmd/module.h.
	(build_filename_from_loc): New function.
	(d_assert_call): Rename to...
	(build_assert_call): ...this.
	(build_array_bounds_call): Call arrayboundsp variant of the array
	bounds failure callback.
	(build_bounds_condition): Rename to...
	(build_bounds_index_condition): ...this.  Update signature.
	(build_bounds_slice_condition): New function.
	(checkaction_trap_p): New function.
	(d_assert_call): Call assertp variant of assert failure callback.
	* d-tree.h (class IndexExp): Declare.
	(class SliceExp): Declare.
	(build_bounds_condition): Remove.
	(build_assert_call): Declare.
	(build_bounds_index_condition): Declare.
	(build_bounds_slice_condition): Declare.
	(checkaction_trap_p): Declare.
	(d_assert_call): Remove.
	* expr.cc (ExprVisitor::visit(IndexExp *)): Call
	build_bounds_index_condition.
	(ExprVisitor::visit(SliceExp *)): Call build_bounds_slice_condition.
	(ExprVisitor::visit(AssertExp *)): Update setting of libcall.
	* runtime.cc (enum d_libcall_type): Add LCT_IMMUTABLE_CHARPTR.
	(get_libcall_type): Handle LCT_IMMUTABLE_CHARPTR.
	* runtime.def (ASSERT): Rename to...
	(ASSERTP): ...this.  Update signature.
	(UNITTEST): Rename to...
	(UNITTESTP): ...this.  Update signature.
	(ARRAY_BOUNDS): Rename to...
	(ARRAYBOUNDSP): ...this.  Updates signature.
	* toir.cc (IRVisitor::visit(SwitchErrorStatement *)): Update call.