Add new information gathering to the lldb & simple backtrace methods:
print five words of memory at the beginning of the stack frame so it's
easier to track where an incorrect saved-fp or saved-pc may have come from.



git-svn-id: https://llvm.org/svn/llvm-project/lldb/trunk@185903 91177308-0d34-0410-b5e6-96231b3b80d8