std:: fixes to make qtdeclarative closer to compilable with QNX NDK.

Math functions come in std:: when #included through <cmath>

Change-Id: I62550e5c23cb6f4464f2c2f5c4188a91b3512d1a
Reviewed-by: Simon Hausmann <simon.hausmann@digia.com>
Fix various QList<qreal> property related auto test failures in release builds

When registering the QList<qreal> sequence type, make sure to register it
with "QList<qreal>" as name right there. Otherwise it might happen that
the registration (without name) will find an existing QList<double> type id
and not register anything.

Change-Id: I15c837f26bfa713f50dfdbd7c697d55b094f3f0c
Reviewed-by: Erik Verbruggen <erik.verbruggen@digia.com>