interpreters/python: Add Python's port to NuttX

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.

interpreters/python/Setup.local

@@ -0,0 +1,50 @@
+# This file gets copied into the Modules/ folder when building
+# newlib configurations which do not support dynamic library
+# loading.
+
+*disabled*
+_asyncio
+_blake2
+_bz2
+_codecs_cn
+_codecs_hk
+_codecs_iso2022
+_codecs_jp
+_codecs_kr
+_codecs_tw
+_ctypes
+_decimal
+_elementtree
+_hashlib
+_heapq
+_interpchannels
+_interpqueues
+_lsprof
+_lzma
+_md5
+_multibytecodec
+_sha1
+_sha2
+_sha2
+_sha3
+_sha3
+_socket
+_sqlite3
+_ssl
+_statistics
+_testbuffer
+_testcapi
+_testclinic
+_testclinic_limited
+_testexternalinspection
+_testinternalcapi
+_testlimitedcapi
+_uuid
+_xxtestfuzz
+_zoneinfo
+mmap
+pwd
+pyexpat
+readline
+resource
+xxsubtype