[testsuite][aarch64] type_redef_11.c: Update expected diagnostics.

After the fix for PR c/36941 and PR c/88827 (r278976), this test emits
a different error message and needs an update.

2019-12-06  Christophe Lyon  <christophe.lyon@linaro.org>

	PR c/36941
	PR c/88827
	* gcc.target/aarch64/sve/acle/general-c/type_redef_11.c: Update
	expected diagnostics.

From-SVN: r279039

gcc/testsuite/ChangeLog

+2019-12-06  Christophe Lyon  <christophe.lyon@linaro.org>
+
+	PR c/36941
+	PR c/88827
+	* gcc.target/aarch64/sve/acle/general-c/type_redef_11.c: Update
+	expected diagnostics.
+
 2019-12-06  Richard Biener  <rguenther@suse.de>
 
 	PR tree-optimization/92819

gcc/testsuite/gcc.target/aarch64/sve/acle/general-c/type_redef_11.c

@@ -8,5 +8,5 @@ struct svint8x2_t;
 void
 f (svint8x2_t *a, struct svint8x2_t *b)
 {
-  *a = *b; /* { dg-error {dereferencing pointer to incomplete type} } */
+  *a = *b; /* { dg-error {invalid use of undefined type} } */
 }