Make obu default again

This reverts commit b1bf64d5.

Since the root cause of #1143 has been fixed.

Change-Id: I067de02a0d8843e496613559adea126fc218d4dd

build/cmake/aom_config_defaults.cmake

@@ -166,7 +166,7 @@ set(CONFIG_MONO_VIDEO 0 CACHE NUMBER "AV1 experiment flag.")
 set(CONFIG_MV_COMPRESS 1 CACHE NUMBER "AV1 experiment flag.")
 set(CONFIG_NEW_QUANT 0 CACHE NUMBER "AV1 experiment flag.")
 set(CONFIG_NO_FRAME_CONTEXT_SIGNALING 0 CACHE NUMBER "AV1 experiment flag.")
-set(CONFIG_OBU 0 CACHE NUMBER "AV1 experiment flag.")
+set(CONFIG_OBU 1 CACHE NUMBER "AV1 experiment flag.")
 set(CONFIG_OBU_NO_IVF 0 CACHE NUMBER "AV1 experiment flag.")
 set(CONFIG_OPT_REF_MV 0 CACHE NUMBER "AV1 experiment flag.")
 set(CONFIG_PALETTE_THROUGHPUT 1 CACHE NUMBER "AV1 experiment flag.")

configure

@@ -508,7 +508,7 @@ post_process_cmdline() {
       soft_enable ext_comp_refs
       soft_enable ext_delta_q
       soft_enable parallel_deblocking
-      #soft_enable obu
+      soft_enable obu
       soft_enable simple_bwd_adapt
       soft_enable loopfilter_level
       soft_enable cfl