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/frc971/imu_reader/BUILD b/frc971/imu_reader/BUILD
index 809a3fc..d204c56 100644
--- a/frc971/imu_reader/BUILD
+++ b/frc971/imu_reader/BUILD
@@ -17,7 +17,8 @@
         "//aos/util:crc32",
         "//frc971/wpilib:imu_batch_fbs",
         "//frc971/wpilib:imu_fbs",
-        "@com_github_google_glog//:glog",
+        "@com_google_absl//absl/log",
+        "@com_google_absl//absl/log:check",
         "@com_google_absl//absl/types:span",
     ],
 )