Rename SWIG "main" module to "cc_main" so it's

clear from the Python side that this is the
interface to C++.

src/SConscript:
    main_wrap.cc -> cc_main_wrap.cc
src/python/SConscript:
src/python/m5/__init__.py:
src/sim/main.cc:
    s/main/cc_main/
src/python/m5/config.py:
    s/main/cc_main/
    Also directly import cc_main so we don't need
    to put the "m5." in front all the time.

--HG--
extra : convert_revision : 755552f70cf671881ff31e476c677b95ef12950d

src/python/m5/__init__.py

@@ -30,11 +30,11 @@
 import sys, os, time, atexit, optparse
 
 # import the SWIG-wrapped main C++ functions
-import main
+import cc_main
 # import a few SWIG-wrapped items (those that are likely to be used
 # directly by user scripts) completely into this module for
 # convenience
-from main import simulate, SimLoopExitEvent
+from cc_main import simulate, SimLoopExitEvent
 
 # import the m5 compile options
 import defines
@@ -70,7 +70,7 @@ def setStandardOptions(_options):
     global options
     options = _options
     # tell C++ about output directory
-    main.setOutputDir(options.outdir)
+    cc_main.setOutputDir(options.outdir)
 
 # Callback to set trace flags.  Not necessarily the best way to do
 # things in the long run (particularly if we change how these global
@@ -206,10 +206,10 @@ def instantiate(root):
     root.print_ini()
     sys.stdout.close() # close config.ini
     sys.stdout = sys.__stdout__ # restore to original
-    main.loadIniFile(resolveSimObject)  # load config.ini into C++
+    cc_main.loadIniFile(resolveSimObject)  # load config.ini into C++
     root.createCCObject()
     root.connectPorts()
-    main.finalInit()
+    cc_main.finalInit()
     noDot = True # temporary until we fix dot
     if not noDot:
        dot = pydot.Dot()
@@ -223,10 +223,10 @@ def instantiate(root):
 
 # Export curTick to user script.
 def curTick():
-    return main.cvar.curTick
+    return cc_main.cvar.curTick
 
 # register our C++ exit callback function with Python
-atexit.register(main.doExitCleanup)
+atexit.register(cc_main.doExitCleanup)
 
 # This import allows user scripts to reference 'm5.objects.Foo' after
 # just doing an 'import m5' (without an 'import m5.objects').  May not