Rather than tweaking the parser to cover every eventuality with corner
case lines that could cause incorrect header files to be created then
the means to suspend/resume the processing of a file is added.
This enables us to have it skip over the template line that is causing
a QList header to be created as part of the QtGui headers. This patch
includes the fix to solve this in addition.
Fixes: QTBUG-68129
Change-Id: I751646c4b20a4434347c149ae5e6dcb6e7618853
Reviewed-by: Joerg Bornemann <joerg.bornemann@qt.io>