dumpcpp: Add Qt version and command line to header comment block.

produces:

/****************************************************************************
**
** Namespace TestLib generated by dumpcpp v5.5.0 using
** dumpcpp -o test Test.tlb
** from the type library Test.tlb
**
****************************************************************************/

Task-number: QTBUG-27792
Change-Id: I22ef45c424f07ae89e2cbae1d8c05686b0646c5c
Reviewed-by: Andy Shaw <andy.shaw@theqtcompany.com>