libunwind: fix build with aarch64
Referred to RP's fix for x86 and x86-64:
34d517a5626ce2465f776367349bd9e66bf8ed1f
libunwind: Build with gold to avoid build failures
Fixed:
aarch64-poky-linux/4.9.2/ld: copy reloc against protected `_Uaarch64_local_addr_space' is invalid
aarch64-poky-linux/4.9.2/ld: failed to set dynamic section sizes: Bad value
aarch64-poky-linux/4.9.2/ld: copy reloc against protected `_Uaarch64_local_addr_space' is invalid
aarch64-poky-linux/4.9.2/ld: failed to set dynamic section sizes: Bad value
| collect2: error: ld returned 1 exit status
Signed-off-by: Robert Yang <liezhi.yang@windriver.com>