gdb-python: Update so 'rtems task' lists the classic tasks.

This is a first pass at cleaning up the support. To use:

 $ waf configure --prefix=$HOME/development/rtems/4.11
 $ waf build install

Start GDB and break at Init:

 (gdb) py import rtems
 (gdb) rtems task

will list the classic API tasks.

tools/gdb/python/__init__.py

@@ -1,8 +1,40 @@
+# RTEMS Tools Project (http://www.rtems.org/)
+# Copyright 2014 Chris Johns (chrisj@rtems.org)
+# All rights reserved.
+#
+# This file is part of the RTEMS Tools package in 'rtems-tools'.
+#
+# Redistribution and use in source and binary forms, with or without
+# modification, are permitted provided that the following conditions are met:
+#
+# 1. Redistributions of source code must retain the above copyright notice,
+# this list of conditions and the following disclaimer.
+#
+# 2. Redistributions in binary form must reproduce the above copyright notice,
+# this list of conditions and the following disclaimer in the documentation
+# and/or other materials provided with the distribution.
+#
+# THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
+# AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+# IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+# ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE
+# LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
+# CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
+# SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
+# INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
+# CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
+# ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
+# POSSIBILITY OF SUCH DAMAGE.
+#
 
-if __name__ == "__main__":
-    import sys
-    import os.path
-    sys.path.append(os.path.dirname(__file__))
-    import main
+import gdb
+import rtems
 
-    print 'RTEMS GDB Support loaded'
+def get_architure():
+    frame = gdb.selected_frame()
+    arch = frame.architecture()
+    return arch.name()
+
+_cmds = rtems.create()
+
+print 'RTEMS GDB Support'