Add "386" as an alias for "x86" ("386" is the value of GOARCH for 32-bit
binaries)

Change-Id: I19f92c2bf0ff511c91410771aa2855b5aa44dc4b
diff --git a/services/mgmt/device/impl/profile.go b/services/mgmt/device/impl/profile.go
index 6410f3a..1d2bd08 100644
--- a/services/mgmt/device/impl/profile.go
+++ b/services/mgmt/device/impl/profile.go
@@ -42,7 +42,7 @@
 		result.Arch = build.AMD64
 	case "arm":
 		result.Arch = build.ARM
-	case "x86":
+	case "x86", "386":
 		result.Arch = build.X86
 	default:
 		return nil, errors.New("Unsupported hardware architecture: " + runtime.GOARCH)