init: create android::init:: namespace

With some small fixups along the way

Test: Boot bullhead
Test: init unit tests
Change-Id: I7beaa473cfa9397f845f810557d1631b4a462d6a
diff --git a/init/log.h b/init/log.h
index 29a27af..5a4eba6 100644
--- a/init/log.h
+++ b/init/log.h
@@ -19,8 +19,14 @@
 
 #include <sys/cdefs.h>
 
+namespace android {
+namespace init {
+
 void InitKernelLogging(char* argv[]);
 
 int selinux_klog_callback(int level, const char* fmt, ...) __printflike(2, 3);
 
+}  // namespace init
+}  // namespace android
+
 #endif