dashboard: update host-linux-loong64-3a5000 owner, ExpectNum, bootstrap

For golang/go#46229

Change-Id: I817d6af1735fb5ca659d4537d401e93ce8e08df0
Reviewed-on: https://go-review.googlesource.com/c/build/+/453457
Auto-Submit: Dmitri Shuralyov <[email protected]>
Auto-Submit: Carlos Amedee <[email protected]>
Reviewed-by: Dmitri Shuralyov <[email protected]>
Run-TryBot: Dmitri Shuralyov <[email protected]>
Reviewed-by: Carlos Amedee <[email protected]>
TryBot-Result: Gopher Robot <[email protected]>
Reviewed-by: xiaodong liu <[email protected]>

Author: abner-chenc

dashboard/builders.go

@@ -353,12 +353,12 @@ var Hosts = map[string]*HostConfig{
 	},
 	"host-linux-loong64-3a5000": {
 		Notes:       "Loongson 3A5000 Box hosted by Loongson; loong64 is the short name of LoongArch 64 bit version",
-		Owners:      []*gophers.Person{gh("XiaodongLoong")},
+		Owners:      []*gophers.Person{gh("XiaodongLoong"), gh("abner-chenc")},
 		IsReverse:   true,
-		ExpectNum:   3,
-		GoBootstrap: "none", // image has Go 1.18; cannot access storage.googleapis.com
+		ExpectNum:   5,
+		GoBootstrap: "none",
 		env: []string{
-			"GOROOT_BOOTSTRAP=/usr/lib/go-1.18",
+			"GOROOT_BOOTSTRAP=/usr/lib/go-linux-loong64-bootstrap",
 		},
 	},
 	"host-linux-mips64-rtrk": {

internal/gophers/gophers.go

@@ -2957,6 +2957,7 @@ func init() {
 	addPerson("Zvonimir Pavlinovic", "[email protected]", "@zpavlinovic")
 	addPerson("a.lukinykh", "[email protected]")
 	addPerson("abdul.mannan", "[email protected]")
+	addPerson("abner chenc", "@abner-chenc")
 	addPerson("acoshift", "[email protected]")
 	addPerson("adrienpetel", "[email protected]", "@feliixx")
 	addPerson("aecdanjun", "[email protected]", "@aecdanjun")