Installd: Fix delete_code_cache() clearing the wrong cache dir

Fix a typo in delete_code_cache() introduced by commit c03de09, which
causes the function to empty /data/data/<package_name>/cache/ rather
than /data/data/<package_name>/code_cache/.

The following CTS test case should now pass:

 com.android.cts.appsecurity.SplitTests#testClearCodeCache

Change-Id: I2d9452d70ed39b3ea29ad65fb35e788c2fef5100
Signed-off-by: Hao Li <hao.i.li@intel.com>
Signed-off-by: Yu Ning <yu.ning@intel.com>
diff --git a/cmds/installd/commands.cpp b/cmds/installd/commands.cpp
index ca04b49..8e42cda 100644
--- a/cmds/installd/commands.cpp
+++ b/cmds/installd/commands.cpp
@@ -299,7 +299,7 @@
 int delete_code_cache(const char *uuid, const char *pkgname, userid_t userid)
 {
     std::string _codecachedir(
-            create_package_data_path(uuid, pkgname, userid) + CACHE_DIR_POSTFIX);
+            create_package_data_path(uuid, pkgname, userid) + CODE_CACHE_DIR_POSTFIX);
     const char* codecachedir = _codecachedir.c_str();
 
     struct stat s;