Make cmdline args consistent with what they do.

Test: Presubmits.
Change-Id: I6d5f827e06526a121f915aae57c6f086ba44f21d
diff --git a/bootstrap/bootstrap.go b/bootstrap/bootstrap.go
index 1f261e1..07c6c93 100644
--- a/bootstrap/bootstrap.go
+++ b/bootstrap/bootstrap.go
@@ -129,8 +129,8 @@
 				`cd / && ` +
 				`env -i "$$BUILDER" ` +
 				`    --top "$$TOP" ` +
-				`    --out "$soongOutDir" ` +
-				`    -n "$outDir" ` +
+				`    --soong_out "$soongOutDir" ` +
+				`    --out "$outDir" ` +
 				`    $extra`,
 			CommandDeps: []string{"$builder"},
 			Description: "$builder $out",