QtIFW

Fix binary data extraction

Extract binary data based on list of available package names when using
"devtool --dump" or "--create-offline-repository" installer option. An
entry in meta data resource only exists if the component actually has
meta data (e.g. a script) so it is not possible to rely on sub
directory structure after copying meta data to extract binary data.

Change-Id: Icd70d3495a921229f0043360b93905dc36cf6514
Task-number: QTIFW-574
Reviewed-by: Karsten Heimrich <karsten.heimrich@theqtcompany.com>