qnx: qt build configuration for QNX 6.5.0 SP1 build

Qt configure args are match to QNX 6.6, except -system-sqlite and -iconv
were removed.

Change-Id: I77027eadd2789d79053af68a70530cd6aa165844
Reviewed-by: Sergio Ahumada <sahumada@blackberry.com>
Reviewed-by: Iikka Eklund <iikka.eklund@digia.com>