amd64: Implemented amd64 IJmp node and refactored address matching functionality
amd64: Small fix for the new IJmp node
Use irg-property framework in a proper way.

Especially, do not confirm consistent out edges.
This fixes ack/t7.c on SPARC.
combo: Factorise join into a separate function.
combo: Correct another comment.
dump: Use the mode of the bitinfo instead of the value for dumping the bitinfo.

The modes may differ.
E.g. execution nodes use a boolean.
localopt: Do not overwrite bitinfo of a node, which exists already.
Do not use undefined bit information.

This fixes opt/fehler231.c and opt/fehler232.c.
constbits: Assign bitinfo to Bad nodes.