[PATCH] - objcopy --extract-symbol clears e_flags ELF header field

[Ronald Hoogenboom]

The --extract-symbol option for objcopy sets the e_flags field in the ELF header to zero.
This is later a problem in ARM if you want to link with this symbols-only object: the linker
ld will reject the object because of the incompatible EABI version, which is part of the e_flags field in ARM.

he attached patch uses bfd_copy_private_bfd_data when the --extract-symbol flag is used and
bfd_copy_private_header_data like it used to when it isn't.

This seems to address the described problem of EABI versions for ARM.

The patch is for the arm-none-eabi-binutils-cs-2014.05.28-3 version used in fedora 21. It may probably just apply
with some fuzz.

Refer to bugzilla bug 19090.

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