Synchronize DF_1_* flags with binutils (Bug 22707)

This patch synchronizes DF_1_* flags with binutils
and ensures that all DF_1_* flags defined in binutil's
include/elf/common.h are also defined glibc's elf/elf.h.
This is a user visible change since elf/elf.h is installed
by default as /usr/include/elf.h.

Signed-off-by: Carlos O'Donell <carlos@redhat.com>