algo: add missing includes

alib2algo/src/automaton/convert/ToPostfixPushdownAutomaton.h

alib2algo/src/automaton/convert/ToPrefixPushdownAutomaton.h

alib2algo/src/automaton/convert/ToRTEStateElimination.h

alib2algo/src/automaton/determinize/Determinize.h

alib2algo/src/automaton/properties/BackwardBisimulation.h

alib2algo/src/automaton/properties/DistinguishableStates.h

alib2algo/src/automaton/properties/ForwardBisimulation.h

alib2algo/src/automaton/simplify/MinimizeVerbose.h

alib2algo/src/automaton/simplify/ToArcFactored.h

alib2algo/src/automaton/transform/AutomataConcatenation.h

...omaton/transform/AutomataConcatenationEpsilonTransition.h

...utomaton/transform/AutomataIntersectionCartesianProduct.h

...utomaton/transform/AutomataLeftQuotientCartesianProduct.h

alib2algo/src/automaton/transform/AutomataUnion.h

...o/src/automaton/transform/AutomataUnionCartesianProduct.h

.../src/automaton/transform/AutomataUnionEpsilonTransition.h

.../automaton/transform/AutomataUnionMultipleInitialStates.h

alib2algo/src/automaton/transform/PDAToRHPDA.h

alib2algo/src/grammar/transform/GrammarAlternation.h

alib2algo/src/grammar/transform/GrammarConcatenation.h