Add dependency on libdl_android

platform private symbols have been moved to libdl_android.so
since they are not intended to be accessible from apps.

Test: make
Change-Id: I34935206e078a064841fe00b293f24df358e50ad
diff --git a/libs/graphicsenv/Android.bp b/libs/graphicsenv/Android.bp
index 0571dcc..56521bf 100644
--- a/libs/graphicsenv/Android.bp
+++ b/libs/graphicsenv/Android.bp
@@ -27,6 +27,7 @@
         "libbase",
         "libbinder",
         "libcutils",
+        "libdl_android",
         "liblog",
         "libutils",
     ],