Move over to ABSL logging and flags.

Removes gperftools too since that wants gflags.

Here come the fireworks.

Change-Id: I79cb7bcf60f1047fbfa28bfffc21a0fd692e4b1c
Signed-off-by: Austin Schuh <austin.linux@gmail.com>
diff --git a/aos/aos_cli_utils.h b/aos/aos_cli_utils.h
index 199c490..980f94f 100644
--- a/aos/aos_cli_utils.h
+++ b/aos/aos_cli_utils.h
@@ -1,7 +1,7 @@
 #ifndef AOS_AOS_CLI_UTILS_H_
 #define AOS_AOS_CLI_UTILS_H_
 
-#include "gflags/gflags.h"
+#include "absl/flags/flag.h"
 
 #include "aos/configuration.h"
 #include "aos/events/shm_event_loop.h"