Update white list comment from Jim

test/whitelist/binutils/glibc.log

@@ -1,6 +1,15 @@
 #
-# XXX: Unknwon.
+# Missing a relaxation to convert PC-relative GOT references to
+# local symbols to PC-relative direct references.
+#
+# This is an optimization, not a correctness issue.
 #
 FAIL: indirect5c dynsym
 FAIL: indirect5d dynsym
+#
+# Similarly to the above case, needs a new relaxation and maybe a new relocation
+# to eliminate tprel relocations in pie mode.
+#
+# This is an optimization, not a correctness issue too.
+#
 FAIL: Build pr22263-1