Fix private modules install path

Bug: 220644706
Test: make and find the private modules in dist.
Change-Id: I25d123128fab6a0a3bfcf73de1aadd19a69d1f7a
diff --git a/Makefile b/Makefile
index 82ce8e0..ca4dd72 100644
--- a/Makefile
+++ b/Makefile
@@ -23,8 +23,8 @@
 modules_install:
 	@echo "$(MAKE) INSTALL_MOD_STRIP=1 M=$(M) -C $(KERNEL_SRC) modules_install"
 	@$(MAKE) INSTALL_MOD_STRIP=1 M=$(M) -C $(KERNEL_SRC) modules_install
-	mkdir -p ${OUT_DIR}/private/modules
-	cd ${OUT_DIR}/$(M)/; find -name "*.ko" -exec cp {} ${OUT_DIR}/private/modules/ \;
+	mkdir -p ${OUT_DIR}/../private/modules
+	cd ${OUT_DIR}/$(M)/; find -name "*.ko" -exec cp {} ${OUT_DIR}/../private/modules/ \;
 
 
 clean: