Enable obu_redundant_frame_header by default.

Change default value of CONFIG_OBU_REDUNDANT_FRAME_HEADER
to 1 in aom_config_defaults.cmake.

Change-Id: I71c1b01a1b7316c769eb64cab68d4e5f294e5c83
diff --git a/build/cmake/aom_config_defaults.cmake b/build/cmake/aom_config_defaults.cmake
index b16562b..558f4e6 100644
--- a/build/cmake/aom_config_defaults.cmake
+++ b/build/cmake/aom_config_defaults.cmake
@@ -104,7 +104,7 @@
 set(CONFIG_LOWPRECISION_BLEND 1 CACHE NUMBER "AV1 experiment flag.")
 set(CONFIG_MONO_VIDEO 1 CACHE NUMBER "AV1 experiment flag.")
 set(CONFIG_OBU_FRAME 1 CACHE NUMBER "AV1 experiment flag.")
-set(CONFIG_OBU_REDUNDANT_FRAME_HEADER 0 CACHE NUMBER "AV1 experiment flag.")
+set(CONFIG_OBU_REDUNDANT_FRAME_HEADER 1 CACHE NUMBER "AV1 experiment flag.")
 set(CONFIG_OPERATING_POINTS 0 CACHE NUMBER "AV1 experiment flag.")
 set(CONFIG_RD_DEBUG 0 CACHE NUMBER "AV1 experiment flag.")
 set(CONFIG_SCALABILITY 1 CACHE NUMBER "AV1 experiment flag.")