Adds two missing personality(2) personas: UNAME26
and FDPIC_FUNCPTRS.

FDPIC_FUNCPTRS was also missing its corresponding
PER_LINUX_FDPIC value.

This makes musl's personality.h header consistent with
the definitions supplied by glibc's personality.h.
---
include/sys/personality.h | 3 +++
1 file changed, 3 insertions(+)