More strict search for patterns within RQG output.

util/simplify-grammar.pl allows to assign patterns of the RQG output we are searching for.
Current algorithm:
   Success for current simplification in case all assigned patterns occur somewhere within the RQG log.
Disadvantage: This algorithm tends to "false" success judgement.
Proposed algorithm:
     Rightmost refers to file and not to line.
     Search for rightmost position where <pattern n+1> occurs
     Found: No --> no success of simplification attempt
                    Yes --> Check if this position is after the rightmost position where <pattern n> occured
                                   No -> no success of simplification attempt because the order is wrong
                                   Yes -> Search for rightmost position where <pattern n+2> occurs
                                                 .....