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/services/java/com/android/server/pm/Installer.java b/services/java/com/android/server/pm/Installer.java
index 4268ae0..85de349 100644
--- a/services/java/com/android/server/pm/Installer.java
+++ b/services/java/com/android/server/pm/Installer.java
@@ -369,10 +369,10 @@
      */
     public int linkNativeLibraryDirectory(String dataPath, String nativeLibPath) {
         if (dataPath == null) {
-            Slog.e(TAG, "unlinkNativeLibraryDirectory dataPath is null");
+            Slog.e(TAG, "linkNativeLibraryDirectory dataPath is null");
             return -1;
         } else if (nativeLibPath == null) {
-            Slog.e(TAG, "unlinkNativeLibraryDirectory nativeLibPath is null");
+            Slog.e(TAG, "linkNativeLibraryDirectory nativeLibPath is null");
             return -1;
         }
 
@@ -383,16 +383,4 @@
 
         return execute(builder.toString());
     }
-
-    public int unlinkNativeLibraryDirectory(String dataPath) {
-        if (dataPath == null) {
-            Slog.e(TAG, "unlinkNativeLibraryDirectory dataPath is null");
-            return -1;
-        }
-
-        StringBuilder builder = new StringBuilder("unlinklib ");
-        builder.append(dataPath);
-
-        return execute(builder.toString());
-    }
 }