Extend r279588 to g++.dg/ext/sve-sizeless-1.C

In r279588 I'd for some reason only patched g++.dg/ext/sve-sizeless-2.C,
even though g++.dg/ext/sve-sizeless-1.C has the same problem.

2020-01-22  Richard Sandiford  <richard.sandiford@arm.com>

gcc/testsuite/
	* g++.dg/ext/sve-sizeless-1.C: Don't expect an error for alias
	templates.

gcc/testsuite/ChangeLog

+2020-01-22  Richard Sandiford  <richard.sandiford@arm.com>
+
+	* g++.dg/ext/sve-sizeless-1.C: Don't expect an error for alias
+	templates.
+
 2020-01-22  Richard Biener  <rguenther@suse.de>
 
 	PR tree-optimization/93381

gcc/testsuite/g++.dg/ext/sve-sizeless-1.C

@@ -74,7 +74,7 @@ template class templated_struct5<svint8_t>;
 
 #if __cplusplus >= 201103L
 template<int N> using typedef_sizeless1 = svint8_t;
-template<int N> using typedef_sizeless1 = svint8_t; // { dg-error {redefinition of 'template<int N> using typedef_sizeless1 = svint8_t'} "" { target c++11 } }
+template<int N> using typedef_sizeless1 = svint8_t;
 template<typename T> using array = T[2];
 #endif