Some clarifications in preparation to automatically order linker dependencies

Test: Browse the code and determine whether it's easier to understand
Bug: 66260943
Change-Id: I88c24a8a31ef68f428919087d206433659265684
diff --git a/cc/relocation_packer.go b/cc/relocation_packer.go
index c9f82ba..d9b367c 100644
--- a/cc/relocation_packer.go
+++ b/cc/relocation_packer.go
@@ -56,7 +56,7 @@
 	if ctx.AConfig().Getenv("DISABLE_RELOCATION_PACKER") == "true" {
 		enabled = false
 	}
-	if ctx.sdk() {
+	if ctx.useSdk() {
 		enabled = false
 	}
 	if p.Properties.Pack_relocations != nil &&