[BUGFIX] Use correct value for EU flag in sys_language records

Change-Id: I6cb873b0013f8324f247a19de4f663ca2e4d4848
Resolves: #80834
Releases: master, 7.6
Reviewed-on: https://review.typo3.org/52436


Tested-by: TYPO3com <no-reply@typo3.com>
Tested-by: Riccardo De Contardi <erredeco@gmail.com>
Reviewed-by: Henrik Elsner <helsner@dfau.de>
Tested-by: Henrik Elsner <helsner@dfau.de>
Reviewed-by: Elmar Hinz <t3elmar@gmail.com>
Reviewed-by: Christian Kuhn <lolli@schwarzbu.ch>
Tested-by: Christian Kuhn <lolli@schwarzbu.ch>