Fix line terminator pattern in testcase.

I observed this testcase was failing on nios2-elf.  The more general
regexp was copied from other tests using dg-output.

2020-01-21  Sandra Loosemore  <sandra@codesourcery.com>

	gcc/testsuite/
	* g++.dg/coroutines/torture/mid-suspend-destruction-0.C: Generalize
	line terminators in patterns.

gcc/testsuite/ChangeLog

+2020-01-21  Sandra Loosemore  <sandra@codesourcery.com>
+
+	* g++.dg/coroutines/torture/mid-suspend-destruction-0.C: Generalize
+	line terminators in patterns.
+
 2020-01-21  Richard Sandiford  <richard.sandiford@arm.com>
 
 	* gcc.target/aarch64/sve/acle/general-c/load_1.c (f1): Cast to

gcc/testsuite/g++.dg/coroutines/torture/mid-suspend-destruction-0.C

 // { dg-do run }
-// { dg-output "main: returning\n" }
-// { dg-output "Destroyed coro1\n" }
-// { dg-output "Destroyed suspend_always_prt\n" }
-// { dg-output "Destroyed Promise\n" }
+// { dg-output "main: returning(\n|\r\n|\r)" }
+// { dg-output "Destroyed coro1(\n|\r\n|\r)" }
+// { dg-output "Destroyed suspend_always_prt(\n|\r\n|\r)" }
+// { dg-output "Destroyed Promise(\n|\r\n|\r)" }
 
 // Check that we still get the right DTORs run when we let a suspended coro
 // go out of scope.