Bionic support

The default pkl aarch64 executable doesn't work on termux (or Android, basically), and I have no idea how to recompile the source code. The only workaround as of now is using something like andronix, where the pkl executable does work.

Start by reproducing the default pkl aarch64 executable failure in Termux on Android and record the observed error. Then inspect the available source build path to determine what prevents the executable from running on that platform. Done means pkl runs on Termux or Android, with the relevant build or usage steps documented.

Written by the indexing model from the issue text.