Enable txfm pruning for realtime mode

Performance:
 SPD_SET | TESTSET | AVG_PSNR | OVR_PSNR |  SSIM   |  SPD
---------+---------+----------+----------+---------+-------
    5    |rtc_derf | +0.313%  | +0.289%  | +0.174% | +7.5%
    5    |   rtc   | +0.504%  | +0.460%  | +0.332% |+10.1%
---------+---------+----------+----------+---------+-------
    6    |rtc_derf | +0.360%  | +0.335%  | +0.085% | +4.7%
    6    |   rtc   | +0.516%  | +0.485%  | +0.339% |+10.4%
---------+---------+----------+----------+---------+-------

STATS_CHANGED

Change-Id: I5037b6d5e879f8474d18a5ba79f62f2b041a34ab
diff --git a/av1/encoder/speed_features.c b/av1/encoder/speed_features.c
index 3570571..1fa1b03 100644
--- a/av1/encoder/speed_features.c
+++ b/av1/encoder/speed_features.c
@@ -1323,6 +1323,7 @@
 
   if (speed >= 5) {
     sf->inter_sf.adaptive_rd_thresh = 4;
+    sf->inter_sf.txfm_rd_gate_level = boosted ? 0 : 4;
 
     sf->rd_sf.tx_domain_dist_level = 2;
     sf->rd_sf.tx_domain_dist_thres_level = 2;
diff --git a/test/rt_end_to_end_test.cc b/test/rt_end_to_end_test.cc
index 6d3704d..b0b8ab2 100644
--- a/test/rt_end_to_end_test.cc
+++ b/test/rt_end_to_end_test.cc
@@ -44,7 +44,7 @@
                            { 8, { { 0, 36.0 }, { 3, 36.5 } } },
                            { 9, { { 0, 35.5 }, { 3, 36.0 } } } } },
                        { "niklas_1280_720_30.y4m",
-                         { { 5, { { 0, 34.4 }, { 3, 34.32 } } },
+                         { { 5, { { 0, 34.4 }, { 3, 34.30 } } },
                            { 6, { { 0, 34.2 }, { 3, 34.2 } } },
                            { 7, { { 0, 33.6 }, { 3, 33.6 } } },
                            { 8, { { 0, 33.48 }, { 3, 33.48 } } },