moving frysk.proc.LinuxPtrace* to frysk.proc.ptrace.Linux*

[Andrew Cagney <cagney@redhat.com>]

Just an update and heads up to the on-going task of breaking-out the 
os-specific code in frysk.proc, moving it to more specialized packages vis:
    frysk.proc.dummy - a dummy host - "done"
    frysk.proc.corefile - a host built from core-files - "done"
    frysk.proc.ptrace - a host built using ptrace(2) calls

For frysk.proc.ptrace, there'll likely soon be some interesting fallout:

-> as WIP have << frysk.proc.ptrace.LinuxHost extend 
frysk.proc.LinuxPtraceHost extend frysk.proc.Host >>, (perhaps also 
similar for Task and Proc?) so that code can more incrementally be 
switched to the new frysk.proc.ptrace package

-> Eliminate methods such as <<abstract void Task.sendAttach()>> from 
frysk.proc.Task inlining the implementation into 
frysk.proc.ptrace.LinuxTaskState; they assume "ptrace" semantics which 
only applies to ptrace

-> Add more manipulation methods, such as proc.reparent(Proc) to 
abstract some of the tree manipulation operations

take care,
Andrew