This code was duplicated in every qcollator_platform.cpp and identical everywhere,
except in _icu, which uses a QByteArray m_key and the implementation used
QByteArray::operator<, which is semantically and probably code-wise identical to
what the other implementations did (after inlining).
Inlining this function removes a potential maintenance problem and increases
speed without violating encapsulation.
Change-Id: If3e9d38a7d4326b49f0611a9f4187c53960e8a03
Reviewed-by: Lars Knoll <lars.knoll@digia.com>
e721cf1508