Remove "unlinklib" command from installd

unlinklib is no longer necessary since libraries are now either stored
in an ASEC container or in /data/app-lib

Replace lib directory with a symlink to the /data/app-lib directory even
if it's a dangling link. That way developers don't name something "lib"
in their directory which gets blown away during an update.

Change-Id: I142cf13dba9c13aafbaf0ff8d5e9872cbf1cc910
diff --git a/cmds/installd/installd.c b/cmds/installd/installd.c
index cc8f014..a099537 100644
--- a/cmds/installd/installd.c
+++ b/cmds/installd/installd.c
@@ -126,11 +126,6 @@
     return linklib(arg[0], arg[1]);
 }
 
-static int do_unlinklib(char **arg, char reply[REPLY_MAX])
-{
-    return unlinklib(arg[0]);
-}
-
 struct cmdinfo {
     const char *name;
     unsigned numargs;
@@ -152,7 +147,6 @@
     { "rmuserdata",           2, do_rm_user_data },
     { "movefiles",            0, do_movefiles },
     { "linklib",              2, do_linklib },
-    { "unlinklib",            1, do_unlinklib },
     { "mkuserdata",           3, do_mk_user_data },
     { "rmuser",               1, do_rm_user },
     { "cloneuserdata",        3, do_clone_user_data },
@@ -290,6 +284,11 @@
         return -1;
     }
 
+    // Get the android app native library directory.
+    if (copy_and_append(&android_app_lib_dir, &android_data_dir, APP_LIB_SUBDIR) < 0) {
+        return -1;
+    }
+
     // Get the sd-card ASEC mount point.
     if (get_path_from_env(&android_asec_dir, "ASEC_MOUNTPOINT") < 0) {
         return -1;