Android: implement vlc_strerror and vlc_strerror_c

Android does not have strerror_l() and won't have it any time soon.

Localization is not required as these messages will never be displayed.
Signed-off-by: Rafaël Carré <funman@videolan.org>

src/Makefile.am

@@ -259,6 +259,7 @@ SOURCES_libvlc_darwin = \
 SOURCES_libvlc_android = \
 	android/dirs.c \
 	android/thread.c \
+	android/error.c \
 	posix/filesystem.c \
 	android/netconf.c \
 	posix/plugin.c \

src/android/error.c

+/*****************************************************************************
+ * error.c: Android error messages formatting
+ *****************************************************************************
+ * Copyright © 2014 Edward Wang
+ *
+ * This program is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU Lesser General Public License as published by
+ * the Free Software Foundation; either version 2.1 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public License
+ * along with this program; if not, write to the Free Software Foundation,
+ * Inc., 51 Franklin Street, Fifth Floor, Boston MA 02110-1301, USA.
+ *****************************************************************************/
+
+#ifdef HAVE_CONFIG_H
+# include "config.h"
+#endif
+
+#include <string.h>
+
+#include <vlc_common.h>
+
+const char* vlc_strerror(int errnum)
+{
+    return vlc_strerror_c(errnum);
+}
+
+const char* vlc_strerror_c(int errnum)
+{
+    static __thread char android_buf[100];
+    strerror_r(errnum, android_buf, 100);
+    return android_buf;
+}