re PR target/79883 (avr i18n: untranslated "interrupt" or "signal")

	PR target/79883
	* gcc.target/avr/torture/pr57631.c (dg-warning): Quote 'signal'.

From-SVN: r256376

gcc/testsuite/ChangeLog

+2018-01-09  Georg-Johann Lay  <avr@gjlay.de>
+
+	PR target/79883
+	* gcc.target/avr/torture/pr57631.c (dg-warning): Quote 'signal'.
+
 2018-01-09  Tamar Christina  <tamar.christina@arm.com>
 
 	PR target/82641

gcc/testsuite/gcc.target/avr/torture/pr57631.c

@@ -7,11 +7,11 @@ void func1  (void)
 }
 
 void __attribute__((signal)) func2 (void)  __asm ("__vecto1");
-void func2  (void) /* { dg-warning "misspelled signal handler" } */
+void func2  (void) /* { dg-warning "misspelled 'signal' handler" } */
 {
 }
 
 void __attribute__((signal)) __vector_3 (void)  __asm ("__vecto1");
-void __vector_3 (void) /* { dg-warning "misspelled signal handler" } */
+void __vector_3 (void) /* { dg-warning "misspelled 'signal' handler" } */
 {
 }