Retroactively Resolving Bugs

[Rical Jasan]

I noticed BZ #16335 [0] was resolved by 6a3962c4a408 (Document missing
feature test macros; [1]), but I wasn't intentionally working on that
bug so it wasn't annotated accordingly.  I see that
scripts/list-fixed-bugs.py will catch it if I close it (FIXED with
target milestone), but should I also update the ChangeLog entry to
include the [BZ #] tag?  (While the original commit can't be amended, I
could also reference it in the commit message for the ChangeLog update.)

Thank you,
Rical

[0] https://sourceware.org/bugzilla/show_bug.cgi?id=16335
[1] https://sourceware.org/git/gitweb.cgi?p=glibc.git;h=6a3962c4a408