Build userdebug_plat_sepolicy.cil with Android.bp

Bug: 33691272
Test: build and see $OUT/debug_ramdisk
Change-Id: I7994857a3dd4e54f2c2d35ff8e362ecae93ea7a2
diff --git a/build/soong/policy.go b/build/soong/policy.go
index d734c97..9d574c9 100644
--- a/build/soong/policy.go
+++ b/build/soong/policy.go
@@ -317,7 +317,12 @@
 	conf := android.PathForModuleSrc(ctx, *c.properties.Src)
 	cil := c.compileConfToCil(ctx, conf)
 
-	c.installPath = android.PathForModuleInstall(ctx, "etc", "selinux")
+	if c.InstallInDebugRamdisk() {
+		// for userdebug_plat_sepolicy.cil
+		c.installPath = android.PathForModuleInstall(ctx)
+	} else {
+		c.installPath = android.PathForModuleInstall(ctx, "etc", "selinux")
+	}
 	c.installSource = cil
 	ctx.InstallFile(c.installPath, c.stem(), c.installSource)