Move libnative{bridge,loader} to art/

This change moves system/core/libnative{bridge,loader} under art/.

Bug: 137364733
Test: m
Change-Id: I9be7333d00fcd3f36cd80520e50a30ea840187ad
diff --git a/libnativeloader/libnativeloader.map.txt b/libnativeloader/libnativeloader.map.txt
new file mode 100644
index 0000000..40c30bd
--- /dev/null
+++ b/libnativeloader/libnativeloader.map.txt
@@ -0,0 +1,31 @@
+#
+# Copyright (C) 2019 The Android Open Source Project
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#      http://www.apache.org/licenses/LICENSE-2.0
+#
+#  Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+#
+
+# TODO(b/122710865): Prune these uses once the runtime APEX is complete.
+LIBNATIVELOADER_1 {
+  global:
+    OpenNativeLibrary;
+    InitializeNativeLoader;
+    ResetNativeLoader;
+    CloseNativeLibrary;
+    OpenNativeLibraryInNamespace;
+    FindNamespaceByClassLoader;
+    FindNativeLoaderNamespaceByClassLoader;
+    CreateClassLoaderNamespace;
+    NativeLoaderFreeErrorMessage;
+  local:
+    *;
+};