/usr/include/qt5/QtQml/ is in qtdeclarative5-dev 5.2.1-3ubuntu15.
This file is owned by root:root, with mode 0o755.
..
/usr/include/qt5/QtQml/QJSEngine
/usr/include/qt5/QtQml/QJSValue
/usr/include/qt5/QtQml/QJSValueIterator
/usr/include/qt5/QtQml/QJSValueList
/usr/include/qt5/QtQml/QQmlAbstractUrlInterceptor
/usr/include/qt5/QtQml/QQmlApplicationEngine
/usr/include/qt5/QtQml/QQmlAttachedPropertiesFunc
/usr/include/qt5/QtQml/QQmlComponent
/usr/include/qt5/QtQml/QQmlContext
/usr/include/qt5/QtQml/QQmlDebuggingEnabler
/usr/include/qt5/QtQml/QQmlEngine
/usr/include/qt5/QtQml/QQmlError
/usr/include/qt5/QtQml/QQmlExpression
/usr/include/qt5/QtQml/QQmlExtensionInterface
/usr/include/qt5/QtQml/QQmlExtensionPlugin
/usr/include/qt5/QtQml/QQmlFile
/usr/include/qt5/QtQml/QQmlFileSelector
/usr/include/qt5/QtQml/QQmlImageProviderBase
/usr/include/qt5/QtQml/QQmlIncubationController
/usr/include/qt5/QtQml/QQmlIncubator
/usr/include/qt5/QtQml/QQmlInfo
/usr/include/qt5/QtQml/QQmlListProperty
/usr/include/qt5/QtQml/QQmlListReference
/usr/include/qt5/QtQml/QQmlNetworkAccessManagerFactory
/usr/include/qt5/QtQml/QQmlParserStatus
/usr/include/qt5/QtQml/QQmlProperties
/usr/include/qt5/QtQml/QQmlProperty
/usr/include/qt5/QtQml/QQmlPropertyMap
/usr/include/qt5/QtQml/QQmlPropertyValueSource
/usr/include/qt5/QtQml/QQmlScriptString
/usr/include/qt5/QtQml/QQmlTypeInfo
/usr/include/qt5/QtQml/QQmlTypesExtensionInterface
/usr/include/qt5/QtQml/QtQml
/usr/include/qt5/QtQml/QtQmlDepends
/usr/include/qt5/QtQml/QtQmlVersion
/usr/include/qt5/QtQml/qjsengine.h
/usr/include/qt5/QtQml/qjsvalue.h
/usr/include/qt5/QtQml/qjsvalueiterator.h
/usr/include/qt5/QtQml/qqml.h
/usr/include/qt5/QtQml/qqmlabstracturlinterceptor.h
/usr/include/qt5/QtQml/qqmlapplicationengine.h
/usr/include/qt5/QtQml/qqmlcomponent.h
/usr/include/qt5/QtQml/qqmlcontext.h
/usr/include/qt5/QtQml/qqmldebug.h
/usr/include/qt5/QtQml/qqmlengine.h
/usr/include/qt5/QtQml/qqmlerror.h
/usr/include/qt5/QtQml/qqmlexpression.h
/usr/include/qt5/QtQml/qqmlextensioninterface.h
/usr/include/qt5/QtQml/qqmlextensionplugin.h
/usr/include/qt5/QtQml/qqmlfile.h
/usr/include/qt5/QtQml/qqmlfileselector.h
/usr/include/qt5/QtQml/qqmlincubator.h
/usr/include/qt5/QtQml/qqmlinfo.h
/usr/include/qt5/QtQml/qqmllist.h
/usr/include/qt5/QtQml/qqmlnetworkaccessmanagerfactory.h
/usr/include/qt5/QtQml/qqmlparserstatus.h
/usr/include/qt5/QtQml/qqmlprivate.h
/usr/include/qt5/QtQml/qqmlproperty.h
/usr/include/qt5/QtQml/qqmlpropertymap.h
/usr/include/qt5/QtQml/qqmlpropertyvaluesource.h
/usr/include/qt5/QtQml/qqmlscriptstring.h
/usr/include/qt5/QtQml/qtqmlglobal.h
/usr/include/qt5/QtQml/qtqmlversion.h