std: Use correct clone() stub

The previous clone() definition was written for 32bit PPC targets,
trying to execute it on a PPC64 machine lead to countless crashes.

Use the clone() definition kindly lifted from Musl libc.
4e2a4e194bLemonBoy committed on 11/20/2020, 7:38:10 AMparent73be594
1 file changedLine totals unavailable