Use product instead of oem for Product specific module

Bug: 64195575
Test: succeeded building product.img with BOARD_PRODUCTIMAGE_PARTITION_SIZE,
BOARD_PRODUCTIMAGE_FILE_SYSTEM_TYPE and PRODUCT_PRODUCT_VERITY_PARTITION.
Change-Id: Icc4f8c16bc389fe20db680849f311d02df1299c3
diff --git a/android/module.go b/android/module.go
index 0fb9479..14b9f41 100644
--- a/android/module.go
+++ b/android/module.go
@@ -232,8 +232,8 @@
 	Device_specific *bool
 
 	// whether this module is specific to a software configuration of a product (e.g. country,
-	// network operator, etc). When set to true, it is installed into /oem (or /system/oem if
-	// oem partition does not exist).
+	// network operator, etc). When set to true, it is installed into /product (or
+	// /system/product if product partition does not exist).
 	Product_specific *bool
 
 	// init.rc files to be installed if this module is installed