libstd: Add partial implementation of inttypes.h

Signed-off-by: Pawel Dziepak <pdziepak@quarnos.org>
arch/x86: Show register dump on fatal exception

Signed-off-by: Pawel Dziepak <pdziepak@quarnos.org>
arch/x86: Implement IPIs

Signed-off-by: Pawel Dziepak <pdziepak@quarnos.org>