Enable Qt NFC in the CI system.

Don't require CONFIG+=nfc to build QtNfc lib.
This prevents proper test execution and there is no API commitment until
the API is offcially released anyway.

Excludes three auto tests from -developer-build builds
as they require Q_AUTOTEST_EXPORT.

Fixes compile errors associated to namespace'd builds of Qt.

Revert "Remove not needed symbol 'qHash(const QNdefRecord&)'"
The symbol is needed during compilation by Windows.
This reverts commit 39901af48f40f0672731a1f62dc003c4b37d1fec.

Change-Id: I61c644bbfc4906729e6d2b9deb741989030c8624
Reviewed-by: Sergio Ahumada <sergio.ahumada@digia.com>