setarch: add fallback for linux/personality

setarch: add fallback for linux/personality

setarch.c:248: error: 'ADDR_NO_RANDOMIZE' undeclared (first use in this function)
setarch.c:248: error: (Each undeclared identifier is reported only once
setarch.c:248: error: for each function it appears in.)
setarch.c:251: error: 'FDPIC_FUNCPTRS' undeclared (first use in this function)
setarch.c:257: error: 'ADDR_COMPAT_LAYOUT' undeclared (first use in this function)
setarch.c:260: error: 'READ_IMPLIES_EXEC' undeclared (first use in this function)

Linux gzp1 2.4.36.1-gzp1 #1 SMP Tue Feb 19 10:23:48 CET 2008 i686 GNU/Linux

Reported-By: Gabor Z. Papp <gzp@papp.hu>
Signed-off-by: Karel Zak <kzak@redhat.com>