Correct the truncation of thread creation context.  Because csprof_thread_pre_create was inlined into monitor_thread_pre_create, a level of important context was lost when trimming two levels of context.
Correct the truncation of thread creation context.  Because csprof_thread_pre_create was inlined into monitor_thread_pre_create, a level of important context was lost when trimming two levels of context.

zcth428/hpctoolkit,zcth428/hpctoolkit111,zcth428/hpctoolkit,zcth428/hpctoolkit,HPCToolkit/hpctoolkit,HPCToolkit/hpctoolkit,zcth428/hpctoolkit111,zcth428/hpctoolkit111,HPCToolkit/hpctoolkit,zcth428/hpctoolkit,HPCToolkit/hpctoolkit,zcth428/hpctoolkit,HPCToolkit/hpctoolkit,HPCToolkit/hpctoolkit,zcth428/hpctoolkit111,zcth428/hpctoolkit111