[LLDB][MIPS] Debug bare-iron targets lacking support for qC /qfThreadInfo

    SUMMARY:
    Refer to http://lists.llvm.org/pipermail/lldb-dev/2015-August/008024.html for discussion
    on this topic. Bare-iron target like YAMON gdb-stub does not support qProcessInfo, qC,
    qfThreadInfo, Hg and Hc packets. Reply from ? packet is as simple as S05. There is no 
    packet which gives us process or threads information. In such cases, assume pid=tid=1.

    Reviewers: clayborg
    Subscribers: nitesh.jain, mohit.bhakkad, sagar, bhushan and lldb-commits
    Differential Revision: http://reviews.llvm.org/D12876

llvm-svn: 247773