[BUGFIX] ext:aboutmodules broken link to ext:reports

ext:aboutmodules shows some message box if ext:reports
is installed and found some serious problem. The message
has a link to reports module that is broken and fixed
by the patch.

Change-Id: I7d0b2b6573eb960028cb1de0463808eaf5860fbc
Resolves: #40218
Releases: 6.1, 6.0
Reviewed-on: https://review.typo3.org/17877
Reviewed-by: Christian Kuhn
Tested-by: Christian Kuhn