Update Qt Creator configuration files

the 'version' and 'version_tag' fields are not needed anymore

Change-Id: If9eb1021331cfbe64d67b13154617b9e647519f9
Reviewed-by: Iikka Eklund <iikka.eklund@digia.com>
qnx: prepare support for online installer

Separate QNX toolchain and debugger registeration and change the way
QNX location is asked from user, now it's done only if QNX components
are selected for installation.

Change-Id: I8a95e142b1ba957cbe0f93c34213f6f6c0deca00
Reviewed-by: Iikka Eklund <iikka.eklund@digia.com>
Reviewed-by: Sergio Ahumada <sahumada@blackberry.com>