Modify SharpnessAllIntraTest PSNR threshold

Fixed SharpnessAllIntraTestLarge.SharpnessPSNRTest test failure.

Change-Id: I13deb10b23d1551f5d9fea40973a6a432349fab3

test/sharpness_test.cc

diff --git a/test/sharpness_test.cc b/test/sharpness_test.cc
index a487dc2..2247e95 100644
--- a/test/sharpness_test.cc
+++ b/test/sharpness_test.cc
@@ -32,9 +32,9 @@
                            { 4, { { 2, 37.5 }, { 5, 37.5 } } },
                            { 6, { { 2, 37.5 }, { 5, 37.5 } } } } },
                        { static_cast<int>(::libaom_test::kAllIntra),
-                         { { 3, { { 2, 42.3 }, { 5, 42.4 } } },
+                         { { 3, { { 2, 42.3 }, { 5, 42.3 } } },
                            { 6, { { 2, 41.8 }, { 4, 41.9 }, { 5, 41.9 } } },
-                           { 9, { { 2, 41.3 }, { 5, 41.3 } } } } } };
+                           { 9, { { 2, 41.1 }, { 5, 41.1 } } } } } };
 
 // This class is used to test sharpness parameter configured through control
 // call using AOME_SET_SHARPNESS for different encoder configurations.