Move the iteration protocol of lldb objects to the auto-generated lldb Python module.

This is so that the objects which support the iteration protocol are immediately obvious
from looking at the lldb.py file.

SBTarget supports two types of iterations: module and breakpoint.  For an SBTarget instance,
you will need to issue either:

    for m in target.module_iter()

or

    for b in target.breakpoint_iter()

For other single iteration protocol objects, just use, for example:

    for thread in process:
        ID = thread.GetThreadID()
        for frame in thread:
            frame.Disassemble()
            ....

llvm-svn: 130442