Call post_create_inferior in ctf_open.

We don't call post_create_inferior at the end of ctf_open.  It is an
oversight in patch

  [PATCH 2/2] Create inferior for ctf target.
  https://sourceware.org/ml/gdb-patches/2014-01/msg01056.html

This patch is to call post_create_inferior at the end of ctf_open,
like the end of tfile_open.

gdb:

2014-04-19  Yao Qi  <yao@codesourcery.com>

	* ctf.c (ctf_open): Call post_create_inferior.
PR gdb/14018 -- avoid "PC register not available" errors.

gdb/windows-nat.c (thread_rec): Don't display a warning when
SuspendThread fails with ERROR_ACCESS_DENIED.  If SuspendThread
fails for any reason, set th->suspended to -1, so that we don't
try to resume such a thread.  Also, don't return NULL in these
cases, to avoid completely ruin the session due to "PC register is
not available" error.
(do_windows_fetch_inferior_registers): Check errors in
GetThreadContext call.
(windows_continue): Accept an additional argument KILLED; if not
zero, ignore errors in the SetThreadContext call, since the
inferior was killed and is shutting down.
(windows_resume, get_windows_debug_event)
(windows_create_inferior, windows_mourn_inferior)
(windows_kill_inferior): All callers of windows_continue changed
to adjust to its new calling sequence.