Update powerpc-fpu ULPs.
Fix CFI annotations in pthread_cond_timedwait for i486+
Replace malloc force_reg by atomic_forced_read.
Simplify perturb_byte logic.
ChangeLog fix
m68k: don't assume PI futexes before 3.10
m68k: add support for PI futexes
m68k: use math_force_eval in nextafterl
Add GLIBC_2.3 and GLIBC_2.19 in Versions.def

This patch adds GLIBC_2.3 and GLIBC_2.19 mark on Version.def so they are always
define in abi-versions.h. This fixes a build issue with fe_nomask.c in PPC64
LE where neither GLIBC_2_3 or GLIBC_2_19 are defined for SHLIB_COMPAT, resulting
in a wrong evaluation in the macro.