Update the version number in system extensions which
have been forgotten.

Resolves: #42728
Releases: 6.0
Change-Id: I05089f5f0706f3df685bccc68ab8915620f90609
Reviewed-on: http://review.typo3.org/16235
Reviewed-by: Markus Klein
Tested-by: Markus Klein
Reviewed-by: Wouter Wolters
Tested-by: Wouter Wolters
Reviewed-by: Michael Klapper
Reviewed-by: Steffen Ritter
Tested-by: Steffen Ritter
Reviewed-by: Georg Ringer
Tested-by: Georg Ringer