dashboard: enable SSH access in DragonFly BSD builders

Fixes golang/go#38796.

Change-Id: If84c7ba39fe96ce0b93d818ae9f163338d954976
GitHub-Last-Rev: 3548bbc15722b14d819c46f5dabef0ae4a7455b7
GitHub-Pull-Request: golang/build#29
Reviewed-on: https://go-review.googlesource.com/c/build/+/232337
Reviewed-by: Dmitri Shuralyov <dmitshur@golang.org>
Run-TryBot: Dmitri Shuralyov <dmitshur@golang.org>
TryBot-Result: Gobot Gobot <gobot@golang.org>
diff --git a/dashboard/builders.go b/dashboard/builders.go
index f29f610..b900e25 100644
--- a/dashboard/builders.go
+++ b/dashboard/builders.go
@@ -365,6 +365,7 @@
 		ExpectNum:   1,
 		Notes:       "DragonFly BSD release version, run by DragonFly team",
 		env:         []string{"GOROOT_BOOTSTRAP=/usr/local/go"},
+		SSHUsername: "root",
 		OwnerGithub: "tuxillo",
 	},
 	"host-dragonfly-amd64-master": &HostConfig{
@@ -372,6 +373,7 @@
 		ExpectNum:   1,
 		Notes:       "DragonFly BSD master, run by DragonFly team",
 		env:         []string{"GOROOT_BOOTSTRAP=/usr/local/go"},
+		SSHUsername: "root",
 		OwnerGithub: "tuxillo",
 	},
 	"host-freebsd-arm-paulzhol": &HostConfig{