cmd/go: make sure linker -o for plugin doesn't include tempdir path

There is already a case that when buildmode=shared passes only the
basename of the -o argument to the link command to the linker (and
runs in the directory of that argument) to avoid having that
(temporary) directory of the file be included in the LC_ID_DYLIB load
command. Extend the case to buildmode=plugin, because the same thing
can happen there.

This can only happen on darwin: the -o command can be embedded into
Mach-O and PE binaries, but plugin isn't supported on Windows.

For #58557

Change-Id: I7a4a5627148e77c6906ac4583af3d9f053d5b249
Reviewed-on: https://go-review.googlesource.com/c/go/+/477296
Run-TryBot: Michael Matloob <matloob@golang.org>
Reviewed-by: Bryan Mills <bcmills@google.com>
TryBot-Result: Gopher Robot <gobot@golang.org>
Reviewed-by: Michael Matloob <matloob@golang.org>

0 files changed, 0 insertions, 0 deletions