gcc: Clean-up of non-C++0x compliant code, first steps

This patch cleans up a number of minor issues aiming to get closer to
compliance with the C++0x standard as interpreted by gcc and clang
(compile with std=c++0x and -pedantic-errors). In particular, the
patch cleans up enums where the last item was succeded by a comma,
namespaces closed by a curcly brace followed by a semi-colon, and the
use of the GNU-extension typeof (replaced by templated functions). It
does not address variable-length arrays, zero-size arrays, anonymous
structs, range expressions in switch statements, and the use of long
long. The generated CPU code also has a large number of issues that
remain to be fixed, mainly related to overflows in implicit constant
conversion (due to shifts).

src/python/m5/params.py

@@ -1049,7 +1049,7 @@ namespace Enums {
         code.indent(2)
         for val in cls.vals:
             code('$val = ${{cls.map[val]}},')
-        code('Num_$name = ${{len(cls.vals)}},')
+        code('Num_$name = ${{len(cls.vals)}}')
         code.dedent(2)
         code('''\
     };