[AArch64][8/8] LD support BFD_RELOC_AARCH64_TLSLD_ADD_DTPREL_LO12

[AArch64][8/8] LD support BFD_RELOC_AARCH64_TLSLD_ADD_DTPREL_LO12

2015-08-11  Jiong Wang  <jiong.wang@arm.com>

bfd/
  * elfnn-aarch64.c (IS_AARCH64_TLS_RELOC): Recognize
  BFD_RELOC_AARCH64_TLSLD_ADD_DTPREL_LO12.
  (aarch64_reloc_got_type): Likewise.
  (elfNN_aarch64_final_link_relocate): Likewise.
  (elfNN_aarch64_relocate_section): Likewise.
  * elfxx-aarch64.c (_bfd_aarch64_elf_put_addend): Likewise.
  (_bfd_aarch64_elf_resolve_relocation): Likewise.

ld/testsuite/
  * ld-aarch64/emit-relocs-529.s: New testcase.
  * ld-aarch64/emit-relocs-529-overflow.s: Likewise.
  * ld-aarch64/emit-relocs-86.s: Likewise.
  * ld-aarch64/emit-relocs-86-overflow.s: Likewise.
  * ld-aarch64/emit-relocs-529.d: New expectation file.
  * ld-aarch64/emit-relocs-529-overflow.d: Likewise.
  * ld-aarch64/emit-relocs-86.d: Likewise.
  * ld-aarch64/emit-relocs-86-overflow.d: Likewise.
  * ld-aarch64/aarch64-elf.exp: Run new testcases.