If we spawn an lldb process for test (via pexpect), do not load the init file unless told otherwise.
Set up self.lldbOption to be "--no-lldbibit" unless env variable NO_LLDBIBIT is defined and equals "NO".
Also add "-nx" to gdb spawned.

llvm-svn: 141384
diff --git a/lldb/test/functionalities/stop-hook/multiple_threads/TestStopHookMultipleThreads.py b/lldb/test/functionalities/stop-hook/multiple_threads/TestStopHookMultipleThreads.py
index bd70119..8aad81c 100644
--- a/lldb/test/functionalities/stop-hook/multiple_threads/TestStopHookMultipleThreads.py
+++ b/lldb/test/functionalities/stop-hook/multiple_threads/TestStopHookMultipleThreads.py
@@ -43,7 +43,7 @@
         prompt = "(lldb) "
 
         # So that the child gets torn down after the test.
-        self.child = pexpect.spawn('%s %s' % (self.lldbHere, exe))
+        self.child = pexpect.spawn('%s %s %s' % (self.lldbHere, self.lldbOption, exe))
         child = self.child
         # Turn on logging for what the child sends back.
         if self.TraceOn():