Fix a few missing include statements

Discovered by clang-tidy

Change-Id: If638a462431b2561e06064afffda6fe90f0c68a3

av1/encoder/encoder_utils.c

diff --git a/av1/encoder/encoder_utils.c b/av1/encoder/encoder_utils.c
index 86a3abf..4519b51 100644
--- a/av1/encoder/encoder_utils.c
+++ b/av1/encoder/encoder_utils.c
@@ -20,9 +20,11 @@
 #include "av1/encoder/encoder_alloc.h"
 #include "av1/encoder/encodetxb.h"
 #include "av1/encoder/encoder_utils.h"
+#include "av1/encoder/firstpass.h"
 #include "av1/encoder/grain_test_vectors.h"
 #include "av1/encoder/mv_prec.h"
 #include "av1/encoder/pass2_strategy.h"
+#include "av1/encoder/ratectrl.h"
 #include "av1/encoder/rc_utils.h"
 #include "av1/encoder/rdopt.h"
 #include "av1/encoder/segmentation.h"

av1/encoder/interp_search.c

diff --git a/av1/encoder/interp_search.c b/av1/encoder/interp_search.c
index 9ea7767..0135d23 100644
--- a/av1/encoder/interp_search.c
+++ b/av1/encoder/interp_search.c
@@ -9,6 +9,7 @@
  * PATENTS file, you can obtain it at www.aomedia.org/license/patent.
  */
 
+#include "av1/common/filter.h"
 #include "av1/common/pred_common.h"
 #include "av1/encoder/interp_search.h"
 #include "av1/encoder/model_rd.h"

av1/encoder/rdopt.c

diff --git a/av1/encoder/rdopt.c b/av1/encoder/rdopt.c
index c94b145..c8209dc 100644
--- a/av1/encoder/rdopt.c
+++ b/av1/encoder/rdopt.c
@@ -12,6 +12,8 @@
 #include <assert.h>
 #include <math.h>
 #include <stdbool.h>
+#include <stdint.h>
+#include <string.h>
 
 #include "config/aom_config.h"
 #include "config/aom_dsp_rtcd.h"
@@ -30,6 +32,7 @@
 #include "av1/common/common_data.h"
 #include "av1/common/entropy.h"
 #include "av1/common/entropymode.h"
+#include "av1/common/enums.h"
 #include "av1/common/idct.h"
 #include "av1/common/mvref_common.h"
 #include "av1/common/obmc.h"
@@ -44,6 +47,7 @@
 
 #include "av1/encoder/aq_variance.h"
 #include "av1/encoder/av1_quantize.h"
+#include "av1/encoder/block.h"
 #include "av1/encoder/cost.h"
 #include "av1/encoder/compound_type.h"
 #include "av1/encoder/encodemb.h"