Add libdl_android.so to the list of accessible libs.

The default namespace need access to libdl_android.so from platform
namespace for libgraphicsenv.so

Bug: http://b/130373059
Test: boot a sailfish with the change wait until it gets to setup wizard
Change-Id: I55faa4b42f863dfbcc3b959d113cf481c7e2e337
(cherry picked from commit a1ce07c1)