QVarLengthArray: add rvalue overload of append/push_back

Improves performance when appending temporaries, esp. since
the aliasing fix in the lvalue overload in 0f730ef made that
overload correct, but a bit slower across reallocs.

The unit tests already also pass rvalues, so the function is
covered in the existing tests.

[ChangeLog][QtCore][QVarLengthArray] Added rvalue overloads
of append() and push_back().

Change-Id: If3a6970f03a160cba5b42d33d32d3d18948f6ce3
Reviewed-by: Thiago Macieira <thiago.macieira@intel.com>
Reviewed-by: Edward Welbourne <edward.welbourne@qt.io>

0 files changed, 0 insertions, 0 deletions