cmd/go, cmd/internal/objabi: detect "devel" version by substring

These were the remaining instances in the main Go repo I found where a
Go version like "devel go1.25-9ce47e66e8 Wed Mar 26 03:48:50 2025 -0700"
is considered to be a development version rather than a release version,
but the version "go1.25-devel_9ce47e66e8 Wed Mar 26 03:48:50 2025 -0700"
is not.

Update this in preparation of the move of "devel" from front to middle.

For #73372.
For #73369.

Change-Id: If5442ecb0751c08b3a1b4d1148193e501700b956
Cq-Include-Trybots: luci.golang.try:gotip-linux-amd64-longtest
Reviewed-on: https://go-review.googlesource.com/c/go/+/668355
Reviewed-by: Michael Matloob <[email protected]>
LUCI-TryBot-Result: Go LUCI <[email protected]>
Auto-Submit: Dmitri Shuralyov <[email protected]>
Reviewed-by: Dmitri Shuralyov <[email protected]>

Author: dmitshur

src/cmd/go/internal/work/buildid.go

@@ -169,10 +169,10 @@ func (b *Builder) toolID(name string) string {
 
 		line := stdout.String()
 		f := strings.Fields(line)
-		if len(f) < 3 || f[0] != name && path != VetTool || f[1] != "version" || f[2] == "devel" && !strings.HasPrefix(f[len(f)-1], "buildID=") {
+		if len(f) < 3 || f[0] != name && path != VetTool || f[1] != "version" || strings.Contains(f[2], "devel") && !strings.HasPrefix(f[len(f)-1], "buildID=") {
 			base.Fatalf("go: parsing buildID from %s -V=full: unexpected output:\n\t%s", desc, line)
 		}
-		if f[2] == "devel" {
+		if strings.Contains(f[2], "devel") {
 			// On the development branch, use the content ID part of the build ID.
 			return contentID(f[len(f)-1])
 		}

src/cmd/internal/objabi/flag.go

@@ -113,7 +113,7 @@ func (versionFlag) Set(s string) error {
 	// build ID of the binary, so that if the compiler is changed and
 	// rebuilt, we notice and rebuild all packages.
 	if s == "full" {
-		if strings.HasPrefix(buildcfg.Version, "devel") {
+		if strings.Contains(buildcfg.Version, "devel") {
 			p += " buildID=" + buildID
 		}
 	}