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/flatbuffers/base.cc b/aos/flatbuffers/base.cc
index f0e7a8b..77988da 100644
--- a/aos/flatbuffers/base.cc
+++ b/aos/flatbuffers/base.cc
@@ -4,6 +4,9 @@
 
 #include <iomanip>
 
+#include "absl/log/check.h"
+#include "absl/log/log.h"
+
 namespace aos::fbs {
 
 namespace {