Move frameworks/base/tools/ off AndroidConfig.h.

Change-Id: Ibc7abb67a56945a9618bc91ccdbebe4c806879a5
diff --git a/os.h b/os.h
new file mode 100644
index 0000000..79d2c35
--- /dev/null
+++ b/os.h
@@ -0,0 +1,26 @@
+/*
+ * Copyright 2015, 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.
+ */
+
+#ifndef _FRAMEWORKS_BASE_TOOLS_AIDL_OS_SEP_H_
+#define _FRAMEWORKS_BASE_TOOLS_AIDL_OS_SEP_H_
+
+#if defined(_WIN32)
+#define OS_PATH_SEPARATOR '\\'
+#else
+#define OS_PATH_SEPARATOR '/'
+#endif
+
+#endif