Revert part of the previous commit which was wrong. (Looks like the leak is in ConvertImage when the input and output formats are the same ... fix comming)

Makefile.am: $(AM_LDFLAGS) is actually NOT guaranteed to be automatically added to the link command (i really hate automake)

Check some function error codes
Remove a few printfs

       - don't process it with config.status
       - get rif of the duplicate application/x-matroska
   Pointed by kwizart

Revert the two previous commit as we are not using svn checkout, thus can't update, thus there is no clean solution to properly update the build bot.

This will break for the people with a linux/videodev2.h in srcdir or srcdir/modules/access but that's quite unlikely.
Closes #1238