So it can be discarded.

Otherwise MicroPython will pick up glob as an empty namespace package from
the current dir otherwise.

Like, micropython-re-pcre hosts re.py.

MicroPython string type shares setup with bytes, and thus both have entries
for "encode" and "decode" (but only one valid for a type really works).

…rchy.

TODO: elaborate.

It's needed because different LIBC implementation use different shared
library names, so this module abstracts operation of finding the correct
one.

Default search order:

1. libc.so. This is usually doesn't exist, but user can create such symlink,
and it will be used fast.
2. libc.so.0, as used by current uClibc versions.
3. libc.so.6, as used by current Glibc versions.

uClibc is tried first because system where it is used are usually
underpowered to do array of attempts.

User can also override default search names by calling _libc.set_names(),
(which should be called before importing any other modules).

For example, not available in uclibc.