Add more docstring for the lldb_iter() utility function which provides a compact way of iterating through an aggregate data structure.  The added example usage is from an actual use in test/foundation/TestSymbolTable.py:
Add more docstring for the lldb_iter() utility function which provides a compact
way of iterating through an aggregate data structure.  The added example usage
is from an actual use in test/foundation/TestSymbolTable.py:

    2. Pass a container of aggregate which provides APIs to get to the size and
       the element of the aggregate:

    # Module is a container of symbol table 
    module = target.FindModule(filespec)
    for symbol in lldb_iter(module, 'GetNumSymbols', 'GetSymbolAtIndex'):
        name = symbol.GetName()
        ...


git-svn-id: b33bab8abb5b18c12ee100cd7761ab452d00b2b0@121271 91177308-0d34-0410-b5e6-96231b3b80d8

apple/swift-lldb,llvm-mirror/lldb,apple/swift-lldb,llvm-mirror/lldb,apple/swift-lldb,llvm-mirror/lldb,apple/swift-lldb,llvm-mirror/lldb,llvm-mirror/lldb,apple/swift-lldb,apple/swift-lldb