This is our initial port of compiler-rt to Unikraft as an external
library. The port currently requires a libc-equivalent (e.g.,
newlib), libunwind, libcxxabi and libcxx.
Signed-off-by: Vlad-Andrei Badoiu <vlad_andrei.badoiu@stud.acs.upb.ro> Reviewed-by: Felipe Huici <felipe.huici@neclab.eu>