qarraydataops.h: Pass initializer_list by value in copyRanges

initializer_list is supposed to be cheap to copy, and passing by value
will avoid one further indirection (though the compiler can probably see
through it, anyway).

Pick-to: 6.5
Change-Id: I8ffbf5de4d8cf2c85f4cff76ef63d6cdeac4db5a
Reviewed-by: Ahmad Samir <a.samirh78@gmail.com>
Reviewed-by: Marc Mutz <marc.mutz@qt.io>

src/corelib/tools/qarraydataops.h

@@ -215,7 +215,7 @@ public:
 
     struct Span { T *begin; T *end; };
 
-    void copyRanges(const std::initializer_list<Span> &ranges)
+    void copyRanges(std::initializer_list<Span> ranges)
     {
         auto it = this->begin();
         std::for_each(ranges.begin(), ranges.end(), [&it](const auto &span) {