Fix directory path of codecache.

Previously installd removed the normal cache directory when delete_code_cache is
called. It should delete the code cache directory.

BUG=21206499

Change-Id: I5774430e389e22805fa7984b4c83420c3677ca75
diff --git a/cmds/installd/commands.cpp b/cmds/installd/commands.cpp
index faf48ef..f2c76d5 100644
--- a/cmds/installd/commands.cpp
+++ b/cmds/installd/commands.cpp
@@ -344,7 +344,7 @@
 int delete_code_cache(const char *uuid, const char *pkgname, userid_t userid)
 {
     std::string _codecachedir(
-            create_data_user_package_path(uuid, userid, pkgname) + CACHE_DIR_POSTFIX);
+            create_data_user_package_path(uuid, userid, pkgname) + CODE_CACHE_DIR_POSTFIX);
     const char* codecachedir = _codecachedir.c_str();
 
     struct stat s;