[AArch64][4.8] LINK_SPEC changes for Cortex-A53 erratum 835769 workaround

        * config/aarch64/aarch64-elf-raw.h (CA53_ERR_835769_SPEC): Define.
        (LINK_SPEC): Include CA53_ERR_835769_SPEC.
        * config/aarch64/aarch64-linux.h (CA53_ERR_835769_SPEC): Define.
        (LINK_SPEC): Include CA53_ERR_835769_SPEC.


git-svn-id: svn+ssh://gcc.gnu.org/svn/gcc/branches/gcc-4_8-branch@217177 138bc75d-0d04-0410-961f-82ee72b054a4