Add support for thread_local when specified with other legitimate storage class specifiers - extern and static

Examples/test-suite/python/cpp0x_thread_local_runme.py

@@ -0,0 +1,30 @@
+from cpp0x_thread_local import *
+
+t = ThreadLocals()
+if t.stval != 11:
+  raise RuntimeError
+if t.tsval != 22:
+  raise RuntimeError
+if t.tscval99 != 99:
+  raise RuntimeError
+
+cvar.etval = -11
+if cvar.etval != -11:
+  raise RuntimeError
+
+cvar.stval = -22
+if cvar.stval != -22:
+  raise RuntimeError
+
+cvar.tsval = -33
+if cvar.tsval != -33:
+  raise RuntimeError
+
+cvar.etval = -44
+if cvar.etval != -44:
+  raise RuntimeError
+
+cvar.teval = -55
+if cvar.teval != -55:
+  raise RuntimeError
+