Decentralize Python native module linkage

We can now link even smaller Python binaries. For example, the hello.com
program in the Python build directory is a compiled linked executable of
hello.py which just prints hello world. Using decentralized sections, we
can make that binary 1.9mb in size (noting that python.com is 6.3 megs!)

This works for nontrivial programs too. For example, say we want an APE
binary that's equivalent to python.com -m http.server. Our makefile now
builds such a binary using the new launcher and it's only 3.2mb in size
since Python sources get turned into ELF objects, which tell our linker
that we need things like native hashing algorithm code.

third_party/python/Lib/_bootlocale.py

@@ -7,28 +7,15 @@ Don't import directly from third-party code; use the `locale` module instead!
 import sys
 import _locale
 
-if sys.platform.startswith("win"):
-    def getpreferredencoding(do_setlocale=True):
-        return _locale._getdefaultlocale()[1]
-else:
-    try:
-        _locale.CODESET
-    except AttributeError:
-        def getpreferredencoding(do_setlocale=True):
-            # This path for legacy systems needs the more complex
-            # getdefaultlocale() function, import the full locale module.
-            import locale
-            return locale.getpreferredencoding(do_setlocale)
-    else:
-        def getpreferredencoding(do_setlocale=True):
-            assert not do_setlocale
-            result = _locale.nl_langinfo(_locale.CODESET)
-            if not result and sys.platform in ('darwin', 'cosmo'):
-                # nl_langinfo can return an empty string
-                # when the setting has an invalid value.
-                # Default to UTF-8 in that case because
-                # UTF-8 is the default charset on OSX and
-                # returning nothing will crash the
-                # interpreter.
-                result = 'UTF-8'
-            return result
+def getpreferredencoding(do_setlocale=True):
+    assert not do_setlocale
+    result = _locale.nl_langinfo(_locale.CODESET)
+    if not result and sys.platform in ('darwin', 'cosmo'):
+        # nl_langinfo can return an empty string
+        # when the setting has an invalid value.
+        # Default to UTF-8 in that case because
+        # UTF-8 is the default charset on OSX and
+        # returning nothing will crash the
+        # interpreter.
+        result = 'UTF-8'
+    return result