This commit also adds the check for the `__NuttX__` macro to the
patch file that allows setting an attribute to the `_PyRuntime`
structure. The `__NuttX__` macro is guaranteed to be present when
building any application for NuttX.
This wrapper application checks if the Python's modules are already
mounted (and mounts them, if not), sets the necessary environment
variables and, then, runs the Python interpreter.
By setting a specific region for the `_PyRuntime` structure, it is
possible to move it to the external memory, for instance, freeing
the internal memory (this structure occupies around 140KiB).
This is the NuttX's port of Python (cpython)!
Initial support of Python includes building the Python's static
library and the `python` (Programs/python.c) application. Python's
modules are stored in `pyc` (byte-code file) and loaded as needed
from flash.
