cpuid/x86: prefer string_view to view for output

cpuid/x86.cpp

@@ -153,7 +153,7 @@ std::ostream&
 cruft::cpu::operator<< (std::ostream &os, const x86 &val)
 {
     auto const to_string = [] (auto const &obj) {
-        return cruft::view {
+        return std::string_view {
             obj.begin (),
             std::find (obj.begin (), obj.end (), '\0')
         };