[Dev] [abslibre] PR #18: libre/iceweasel: Update to 89.0 upstreams, add info to Remote Settings patch

[bill-auger]

grizzlyuser (or anyone) could you check the newtab page search
box - i noticed that i can not type or paste anything into it -
could that be related to the re4mote settings changes?

i686 is being very troublesome this time - ive tried all the
usual tricks - maybe will skip this version - FWIW,
parabola has v88 now, and arch32 is still at v85