Relax ppc64_elf_tls_optimize assertion

[Alan Modra]

The code in ppc64_elf_tls_optimize looking at the .toc is only
interested in .toc entries that are addresses.  .toc can contain more
than just an array of addresses, so if we have items that aren't
8-byte aligned, ignore them.

	* elf64-ppc.c (ppc64_elf_tls_optimize): Ignore relocs against toc
	entries that aren't a multiple of 8 rather than failing assertion.

diff --git a/bfd/elf64-ppc.c b/bfd/elf64-ppc.c
index e3c06eb..0b65ab1 100644
--- a/bfd/elf64-ppc.c
+++ b/bfd/elf64-ppc.c
@@ -8343,7 +8343,10 @@ ppc64_elf_tls_optimize (struct bfd_link_info *info)
 		      else
 			value = sym->st_value;
 		      value += rel->r_addend;
-		      BFD_ASSERT (value < toc->size && value % 8 == 0);
+		      if (value % 8 != 0)
+			continue;
+		      BFD_ASSERT (value < toc->size
+				  && toc->output_offset % 8 == 0);
 		      toc_ref_index = (value + toc->output_offset) / 8;
 		      if (r_type == R_PPC64_TLS
 			  || r_type == R_PPC64_TLSGD

-- 
Alan Modra
Australia Development Lab, IBM