[release-branch.go1.10] cmd/internal/obj/arm64: fix branch-too-far with TBZ like instructions

The compiler now emits TBZ like instructions, but the assembler's
too-far-branch patch code didn't include that case. Add it.

Updates #23889
Fixes #25794

Change-Id: Ib75f9250c660b9fb652835fbc83263a5d5073dc5
Reviewed-on: https://go-review.googlesource.com/94902


Run-TryBot: Cherry Zhang <cherryyz@google.com>
TryBot-Result: Gobot Gobot <gobot@golang.org>
Reviewed-by: David Chase <drchase@google.com>
(cherry picked from commit 911839c1)
Reviewed-on: https://go-review.googlesource.com/c/147057


Reviewed-by: Cherry Zhang <cherryyz@google.com>
Run-TryBot: Dmitri Shuralyov <dmitshur@golang.org>