[BUGFIX] Autoloader fails for several classes

Due to false path the autoloader doesn't work in several cases. This patch
attaches the last class name parameter to file path.

Change-Id: Id3a7ee7204944267824f70457d4786c38cd278ec
Fixes: #40339
Related: #40095
Releases: 6.0
Reviewed-on: http://review.typo3.org/14153
Reviewed-by: Jigal van Hemert
Tested-by: Jigal van Hemert
Reviewed-by: Thomas Maroschik
Tested-by: Thomas Maroschik