mozilla-central modules for debugger detection

Borrows two python modules from mozilla-central to give mach the ability
to detect and pass arguments to a system's preferred debugger.

Links to borrowed files:
http://hg.mozilla.org/mozilla-central/file/c9cfa9b91dea/testing/mozbase/mozinfo/mozinfo/mozinfo.py
http://hg.mozilla.org/mozilla-central/file/c9cfa9b91dea/testing/mozbase/mozdebug/mozdebug/mozdebug.py

python/mozinfo/__init__.py

@@ -0,0 +1,56 @@
+# This Source Code Form is subject to the terms of the Mozilla Public
+# License, v. 2.0. If a copy of the MPL was not distributed with this file,
+# You can obtain one at http://mozilla.org/MPL/2.0/.
+
+"""
+interface to transform introspected system information to a format palatable to
+Mozilla
+
+Module variables:
+
+.. attribute:: bits
+
+   32 or 64
+
+.. attribute:: isBsd
+
+   Returns ``True`` if the operating system is BSD
+
+.. attribute:: isLinux
+
+   Returns ``True`` if the operating system is Linux
+
+.. attribute:: isMac
+
+   Returns ``True`` if the operating system is Mac
+
+.. attribute:: isWin
+
+   Returns ``True`` if the operating system is Windows
+
+.. attribute:: os
+
+   Operating system [``'win'``, ``'mac'``, ``'linux'``, ...]
+
+.. attribute:: processor
+
+   Processor architecture [``'x86'``, ``'x86_64'``, ``'ppc'``, ...]
+
+.. attribute:: version
+
+   Operating system version string. For windows, the service pack information is also included
+
+.. attribute:: info
+
+   Returns information identifying the current system.
+
+   * :attr:`bits`
+   * :attr:`os`
+   * :attr:`processor`
+   * :attr:`version`
+
+"""
+
+import mozinfo
+from mozinfo import *
+__all__ = mozinfo.__all__