Introduce anonymous namespace

The anonymous namespace is introduced to
handle cases when linker can not find the
caller. This usually happens when caller
code was not loaded by dynamic linker;
for example mono-generated code.

Bug: http://b/25844435
Bug: http://b/22548808
Change-Id: I9e5b1d23c1c75bc78548d68e79216a6a943a33cf
diff --git a/libdl/libdl.c b/libdl/libdl.c
index 3cde5eb..3928ba2 100644
--- a/libdl/libdl.c
+++ b/libdl/libdl.c
@@ -49,7 +49,11 @@
 void android_set_application_target_sdk_version(uint32_t target __unused) { }
 uint32_t android_get_application_target_sdk_version() { return 0; }
 
-bool android_init_public_namespace(const char* paths __unused) { return false; }
+bool android_init_namespaces(const char* public_ns_sonames __unused,
+                             const char* anon_ns_library_path __unused) {
+  return false;
+}
+
 struct android_namespace_t* android_create_namespace(const char* name __unused,
                                                      const char* ld_library_path __unused,
                                                      const char* default_library_path __unused,