Inconsistent value definition - R_AARCH64_TLS_DTPMOD64

[Hán Shěn (沈涵)]

Hi, while we are implementing gold for aarch64, we found reloc type
R_AARCH64_TLS_DTPMOD64 is defined as 1029 in the manual from
http://infocenter.arm.com/help/topic/com.arm.doc.ihi0056b/IHI0056B_aaelf64.pdf
while actually in current bfd and dynamic linker, it is defined as
1028 (binutils-gdb/include/elf/aarch64.h and glibc/elf/elf.h). Shall
we make them consistent to avoid confusion? (Same inconsistency for
R_AARCH64_TLS_DTPREL64 )

Thanks,
Han