Debugger: Distinguish stdout and stderr in LLDB

At least theoretically, on our side. Practically the output
seems to arrive all with ldb.SBProcess.eBroadcastBitSTDOUT
from LLDB.

Change-Id: I61cfb1e01193c57e06aebeaa8defa11809e24c50
Reviewed-by: Eike Ziller <eike.ziller@digia.com>

share/qtcreator/debugger/lldbbridge.py

@@ -1306,7 +1306,7 @@ class Dumper(DumperBase):
                 % binascii.hexlify(msg))
         elif type == lldb.SBProcess.eBroadcastBitSTDERR:
             msg = self.process.GetSTDERR(1024)
-            self.report('output={channel="stdout",data="%s"}'
+            self.report('output={channel="stderr",data="%s"}'
                 % binascii.hexlify(msg))
         elif type == lldb.SBProcess.eBroadcastBitProfileData:
             pass