analyzer: Fix -Wanalyzer-possible-null-argument warning (PR 96014)

gcc/testsuite/ChangeLog:

	PR testsuite/96014
	* g++.dg/analyzer/pr94028.C: Make operator new non-throwing so
	that the compiler doesn't implicitly mark it as returning
	non-null.

gcc/testsuite/g++.dg/analyzer/pr94028.C

@@ -12,7 +12,7 @@ enum e {} i;
 
 struct j
 {
-  void *operator new (__SIZE_TYPE__ b)
+  void *operator new (__SIZE_TYPE__ b) throw()
   {
     return calloc (b, sizeof (int)); // { dg-warning "leak" }
   }