Adjust real-time PSNR threshold in end-to-end unit test

Lower the target PSNR for real-time mode in EndToEndTestLarge to
resolve nightly unit test failures on 12-bit test vectors.

Commit df49183d1a synchronized rd_stats->skip_txfm inside
av1_txfm_search when choosing to skip transforms. This corrected the
skip rate accounting in caller functions leading to more appropriate
skip decisions.

Change-Id: Ibcd245a25a6bbfd8387360792cb416609e1d0447

test/end_to_end_psnr_test.cc

diff --git a/test/end_to_end_psnr_test.cc b/test/end_to_end_psnr_test.cc
index b006509..26c286b 100644
--- a/test/end_to_end_psnr_test.cc
+++ b/test/end_to_end_psnr_test.cc
@@ -31,11 +31,11 @@
 const unsigned int kCqLevel = 18;
 // List of psnr thresholds for speed settings 0-8 and 4 encoding modes
 const double kPsnrThreshold[][4] = {
-  { 34.9, 44.4, 39.5, 41.9 }, { 34.9, 44.4, 39.5, 41.9 },
-  { 34.9, 44.4, 39.4, 41.9 }, { 34.9, 44.4, 39.1, 41.8 },
-  { 34.9, 44.4, 39.1, 41.8 }, { 34.9, 44.29, 38.5, 41.8 },
-  { 34.9, 44.3, 38.5, 41.3 }, { 34.9, 44.3, 38.5, 40.8 },
-  { 34.9, 44.3, 38.5, 40.8 }
+  { 34.1, 44.4, 39.5, 41.9 }, { 34.1, 44.4, 39.5, 41.9 },
+  { 34.1, 44.4, 39.4, 41.9 }, { 34.1, 44.4, 39.1, 41.8 },
+  { 34.1, 44.4, 39.1, 41.8 }, { 34.1, 44.29, 38.5, 41.8 },
+  { 34.1, 44.3, 38.5, 41.3 }, { 34.1, 44.3, 38.5, 40.8 },
+  { 34.1, 44.3, 38.5, 40.8 }
 };
 
 struct TestVideoParam {