all: tighten overly-broad runtime/z* gitignore line
Brad Fitzpatrick authored
Fixes #9231

Change-Id: Ifed6cd37e885415d9a298b63d472d63f44e72321
Reviewed-on: https://go-review.googlesource.com/1290

Reviewed-by: default avatarRuss Cox <rsc@golang.org>
38ecd2e2