liblog: Replace log/log.h with android/log.h

Move all liblog related content into android/log.h, and make
log/log.h points to android/log.h.

Test: Compile
Bug: 26552300
Bug: 31289077
Change-Id: I858e0ebe047b86f2a8530a99bc9c380d3d58edbb
diff --git a/liblog/logprint.c b/liblog/logprint.c
index 668b2ff..d857090 100644
--- a/liblog/logprint.c
+++ b/liblog/logprint.c
@@ -31,8 +31,8 @@
 #include <sys/param.h>
 #include <sys/types.h>
 
+#include <android/log.h>
 #include <cutils/list.h>
-#include <log/log.h>
 #include <log/logprint.h>
 
 #include "log_portability.h"