liblog: remove log_portability.h

__BEGIN_DECLS and __END_DECLS are all that are left, and I can compile
with using normal <sys/cdefs.h>, so hopefully we can remove this at
last.

Test: build
Change-Id: I6df7ef0da027bb91c98806e0f9661d7416ebaa5d

liblog/fake_log_device.h

@@ -16,12 +16,11 @@
 
 #pragma once
 
+#include <sys/cdefs.h>
 #include <sys/types.h>
 
 #include <android/log.h>
 
-#include "log_portability.h"
-
 __BEGIN_DECLS
 
 void FakeClose();

liblog/log_portability.h

@@ -1,33 +0,0 @@
-/*
- * Copyright (C) 2016 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.
- */
-
-#pragma once
-
-#include <sys/cdefs.h>
-#include <unistd.h>
-
-/* possible missing definitions in sys/cdefs.h */
-
-/* DECLS */
-#ifndef __BEGIN_DECLS
-#if defined(__cplusplus)
-#define __BEGIN_DECLS extern "C" {
-#define __END_DECLS }
-#else
-#define __BEGIN_DECLS
-#define __END_DECLS
-#endif
-#endif

liblog/logd_reader.h

@@ -16,10 +16,10 @@
 
 #pragma once
 
+#include <sys/cdefs.h>
 #include <unistd.h>
 
 #include "log/log_read.h"
-#include "log_portability.h"
 
 __BEGIN_DECLS
 

liblog/logger.h

@@ -21,7 +21,6 @@
 
 #include <log/log.h>
 
-#include "log_portability.h"
 #include "uio.h"
 
 __BEGIN_DECLS

liblog/pmsg_reader.h

@@ -16,10 +16,10 @@
 
 #pragma once
 
+#include <sys/cdefs.h>
 #include <unistd.h>
 
 #include "log/log_read.h"
-#include "log_portability.h"
 
 __BEGIN_DECLS