Update libs/libefl

Update libefl to 1.12.1 and fix it’s compilation as well..
Update libs/libinput/Makefile

Update lib input to more recent version
Add libs/libpthread-stubs

Libpthread-stubs is missing from packages at the moment, so it’s been
re-created into rpi-packages since we need it.
Update libs/elementary/Makefile

Update elementary to most recent version. Probably won’t compile as-is—
but this is still WIP, so soon..(?)