Fix nsc/python-scan task descriptions

bindings/python/wscript

@@ -392,11 +392,11 @@ class PythonScanTask(Task.TaskBase):
     """Uses gccxml to scan the file 'everything.h' and extract API definitions.
     """
     def __init__(self, curdirnode, env):
-        self.m_display = 'python-scan'
         self.prio = 5 # everything.h has prio 4
         super(PythonScanTask, self).__init__()
         self.curdirnode = curdirnode
         self.env = env
+        self.m_display = 'python-scan\n'
 
     def run(self):
         #print "Rescanning the python bindings..."

src/internet-stack/wscript

@@ -97,10 +97,10 @@ class NscBuildTask(Task.TaskBase):
     """task that builds nsc
     """
     def __init__(self, builddir):
-        self.m_display = 'build-nsc'
         self.prio = 1000 # build after the rest of ns-3
         self.builddir = builddir
         super(NscBuildTask, self).__init__()
+        self.m_display = 'build-nsc\n'
 
     def run(self):
         # XXX: Detect gcc major version(s) available to build supported stacks