The build on powerPC has been broken when doing some code cleanup
recently.

This patch fixes these regressions.

Fixes: f8a1a1d8d95e ("parasite-syscall: get rid of code_syscall{,size} globals")
Fixes: 69d88241584e ("sigframe: move setup_sas & make it inliner")
Signed-off-by: Laurent Dufour <ldufour@linux.vnet.ibm.com>
Acked-by: Dmitry Safonov <dsafonov@virtuozzo.com>
Signed-off-by: Pavel Emelyanov <xemul@virtuozzo.com>