libknot: sort includes

src/libknot/binary.c

src/libknot/consts.c

src/libknot/descriptor.c

src/libknot/descriptor.h

src/libknot/dname.c

src/libknot/dname.h

src/libknot/errcode.c

src/libknot/packet/compr.c

src/libknot/packet/compr.h

src/libknot/packet/pkt.c

src/libknot/packet/pkt.h

src/libknot/packet/rrset-wire.c

src/libknot/packet/rrset-wire.h

src/libknot/processing/layer.c

src/libknot/processing/layer.h

src/libknot/processing/overlay.c

src/libknot/processing/overlay.h

src/libknot/processing/requestor.c

src/libknot/processing/requestor.h

src/libknot/rdata.c