Debugger: Re-introduce namespace detection for Qt 4

It's apparently still in use.

Change-Id: I89d04c6b3afff8014334e3543c3f3b77bf52d130
Task-number: QTCREATORBUG-19135
Reviewed-by: Christian Stenger <christian.stenger@qt.io>

share/qtcreator/debugger/gdbbridge.py

@@ -996,8 +996,13 @@ class Dumper(DumperBase):
         name = objfile.filename
         if self.isWindowsTarget():
             isQtCoreObjFile = name.find('Qt5Cored.dll') >= 0 or name.find('Qt5Core.dll') >= 0
+            if not isQtCoreObjFile:
+                isQtCoreObjFile = name.find('QtCored.dll') >= 0 or name.find('QtCore.dll') >= 0
         else:
             isQtCoreObjFile = name.find('/libQt5Core') >= 0
+            if not isQtCoreObjFile:
+                isQtCoreObjFile = name.find('/libQtCore') >= 0
+
         if isQtCoreObjFile:
             self.handleQtCoreLoaded(objfile)
 
@@ -1019,6 +1024,13 @@ class Dumper(DumperBase):
                     if len(ns):
                         ns += '::'
                     break
+                if line.find('currentThreadData ') >= 0:
+                    # [ 0] b 0x7ffff67d3000 _ZN2UUL17currentThreadDataE
+                    # section .tbss  UU::currentThreadData qthread_unix.cpp\\n
+                    ns = re.split('_ZN?(\d*)(\w*)L17currentThreadDataE? ', line)[2]
+                    if len(ns):
+                        ns += '::'
+                    break
         os.remove(tmppath)
 
         lenns = len(ns)