Correct the logic in DumpCommandHistory when the end index is UINT32_MAX.

<rdar://problem/13270229>


git-svn-id: https://llvm.org/svn/llvm-project/lldb/trunk@175927 91177308-0d34-0410-b5e6-96231b3b80d8
<rdar://problem/13277100>

Need host_statistics on profile data to get host's user/system/idle clicks


git-svn-id: https://llvm.org/svn/llvm-project/lldb/trunk@175928 91177308-0d34-0410-b5e6-96231b3b80d8