cmd/dist: move "devel" substring in git-inferred development version
Keep the property that the "devel" substring is always present in these
development versions of Go, but also gain the property that it's viable
to use functions in the go/version package such as Lang, Compare, and
get the expected results without needing to trim the "devel " prefix.
For #73369.
For #41116.
Fixes #73372.
Change-Id: Ieea4692e8c6cf0135e010f49f85300f6b038d6b1
Cq-Include-Trybots: luci.golang.try:gotip-linux-amd64-longtest
Reviewed-on: https://go-review.googlesource.com/c/go/+/668015 Reviewed-by: Funda Secgin <fundasecgin30@gmail.com>
LUCI-TryBot-Result: Go LUCI <golang-scoped@luci-project-accounts.iam.gserviceaccount.com> Reviewed-by: Dmitri Shuralyov <dmitshur@google.com>
Auto-Submit: Dmitri Shuralyov <dmitshur@golang.org> Reviewed-by: Michael Pratt <mpratt@google.com>