RFR(M): pass outputStream to more opto debug routines

[Lindenmaier, Goetz]

Hi,

We pass the outputStream to much more debug routines than openJDK does,
as we write a lot more information to files e.g., in case of a crash.

I would like to contribute the changes that allow to pass the output stream to
node->dump() and everything reachable from there.
This also fixes the usage of output stream in print_register_type() in oopMap.cpp and
in MachNullCheckNode::format(), where a single print command still used tty.

Further we initialize _node_regs_max_index so that node_regs_max_index()  == 0
indicates that registers of a node can be accessed.  This is also useful in
debug output.

http://cr.openjdk.java.net/~goetz/webrevs/webrev-os_in_nodeDump/

Best regards,
  Goetz.
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