xAODTrigger: Fix compilation failure with clang.
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2@@ -278,7 +278,6 @@ namespace xAOD {
@@ -290,3 +289,5 @@ std::ostream& operator<<(std::ostream& os, const xAOD::TrigComposite_v1& tc) {
operator<< should be declared within the namespace of its argument so that argument-dependent lookup will work properly.