(syscall) Use RAX if running on x86-64.
(syscall) Use RAX if running on x86-64.

victorisildur/Graphite,8l/Graphite,mit-carbon/Graphite,victorisildur/Graphite,nkawahara/Graphite,8l/Graphite,fhijaz/Graphite,8l/Graphite,nkawahara/Graphite,victorisildur/Graphite,8l/Graphite,fhijaz/Graphite,mit-carbon/Graphite,mit-carbon/Graphite-Cycle-Level,fhijaz/Graphite,victorisildur/Graphite,mit-carbon/Graphite-Cycle-Level,mit-carbon/Graphite,mit-carbon/Graphite,mit-carbon/Graphite-Cycle-Level,nkawahara/Graphite,fhijaz/Graphite,nkawahara/Graphite,mit-carbon/Graphite-Cycle-Level