Port server core to Android

 * Android libutils locks and threads
 * Add Android.mk for building with AOSP
 * Add logger sink for Android
 * Regenerate Android.mk when CMake is run
diff --git a/common/rfb/Logger_android.cxx b/common/rfb/Logger_android.cxx
new file mode 100644
index 0000000..324607a
--- /dev/null
+++ b/common/rfb/Logger_android.cxx
@@ -0,0 +1,60 @@
+/* Copyright (C) 2015 TigerVNC
+ *
+ * This is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This software 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 General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this software; if not, write to the Free Software
+ * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA  02111-1307,
+ * USA.
+ */
+
+// -=- Logger_android.cxx - Logger instance for Android's logd
+
+#include <stdlib.h>
+#include <string.h>
+
+#include <utils/Log.h>
+
+#include <rfb/util.h>
+#include <rfb/Logger_android.h>
+#include <rfb/LogWriter.h>
+
+using namespace rfb;
+
+
+Logger_Android::Logger_Android(const char* loggerName)
+  : Logger(loggerName)
+{
+}
+
+Logger_Android::~Logger_Android()
+{
+}
+
+void Logger_Android::write(int level, const char *logname, const char *message)
+{
+  // Convert our priority level into Android log level
+  if (level >= LogWriter::LEVEL_DEBUG) {
+    ALOGD("%s: %s", logname, message);
+  } else if (level >= LogWriter::LEVEL_INFO) {
+    ALOGI("%s: %s", logname, message);
+  } else if (level >= LogWriter::LEVEL_STATUS) {
+    ALOGW("%s: %s", logname, message);
+  } else {
+    ALOGE("%s: %s", logname, message);
+  }
+}
+
+static Logger_Android logger("android");
+
+void rfb::initAndroidLogger() {
+  logger.registerLogger();
+}