[dev.link] cmd/link: use versioned .TOC. symbols on AIX

[dev.link] cmd/link: use versioned .TOC. symbols on AIX

I thought that only non-static symbols need TOC, but apparently
this is not true. We need to use versioned .TOC. symbols.

Partially fix AIX build. There is still another problem, but this
gets us a bit farther in make.bash.

Change-Id: I40ba4a4dd27da0fc6ab26e4a54ff76bd2930aef1
Reviewed-on: https://go-review.googlesource.com/c/go/+/223379
Run-TryBot: Cherry Zhang <cherryyz@google.com>
TryBot-Result: Gobot Gobot <gobot@golang.org>
Reviewed-by: Than McIntosh <thanm@google.com>