Containers: destroy previous state on move-assignment immediately

[ChangeLog][QtCore] All generic containers (with the exception of
QVarLengthArray, but including QSharedPointer) destroy the
previous state as part of a move-assignment now. Previously, they
would dump it into the right-hand-side object. Note that this is
only true for the generic containers. Other implicitly-shared
types, as well as the non-generic containers QString, QByteArray,
etc. still just swap the contents with the right-hand-side object
when move-assigned into, and, for performance reasons, this will
not change in the forseeable future.

Change-Id: I1f1c684e85400b77bd2e7fba65bde2dce6c1bdde
Reviewed-by: Oswald Buddenhagen <oswald.buddenhagen@theqtcompany.com>
Reviewed-by: Thiago Macieira <thiago.macieira@intel.com>

0 files changed, 0 insertions, 0 deletions