State the name of the log file that contains an error

...to make it easier to debug a failing build

Change-Id: Ic936a6e6026db4208f58e19fb27e2c2d6e4adfec
Reviewed-on: https://gerrit.libreoffice.org/70138
Tested-by: Jenkins
Reviewed-by: Stephan Bergmann <sbergman@redhat.com>

solenv/bin/modules/installer/worker.pm

@@ -162,7 +162,7 @@ sub analyze_and_save_logfile
     # This is important, to get an error code "-1", if an error was found in the log file,
     # that did not break the packaging process
 
-    if ( ! $is_success) { installer::exiter::exit_program("ERROR: Found an error in the logfile. Packaging failed.", "analyze_and_save_logfile"); }
+    if ( ! $is_success) { installer::exiter::exit_program("ERROR: Found an error in the logfile " . $loggingdir . $installer::globals::logfilename . ". Packaging failed.", "analyze_and_save_logfile"); }
 
     return ($is_success, $finalinstalldir);
 }