Fix echo when copying package-res.apk

Bug: 73724997
Test: m checkbuild
Change-Id: Iad9f46e01c40d1993e279c6ea6dd9c60932064c8
diff --git a/core/soong_java_prebuilt.mk b/core/soong_java_prebuilt.mk
index 63a1e2e..96ff376 100644
--- a/core/soong_java_prebuilt.mk
+++ b/core/soong_java_prebuilt.mk
@@ -51,7 +51,7 @@
 my_res_package := $(intermediates.COMMON)/package-res.apk
 
 $(my_res_package): $(LOCAL_SOONG_RESOURCE_EXPORT_PACKAGE)
-	@echo "Copy: $$@"
+	@echo "Copy: $@"
 	$(copy-file-to-target)
 
 $(call add-dependency,$(LOCAL_BUILT_MODULE),$(my_res_package))