Turn off mistakenly turned on DISABLE_TRELLISQ_SEARCH

BUG=aomedia:818

Fixing "NIghtly test "AV1/ResizeCspTest.TestResizeCspWorks/0" fails"

The flag was accidentaly turned on in the commit
c00769a907c7901478481829be1faf3a37018d29.

Change-Id: I9d7102022fddedc9a3e35ae8086159f06067d21c
diff --git a/av1/encoder/rdopt.c b/av1/encoder/rdopt.c
index b8c7339..c6dd076 100644
--- a/av1/encoder/rdopt.c
+++ b/av1/encoder/rdopt.c
@@ -147,7 +147,7 @@
 // transform search. Trellis optimization will still be applied
 // in the final encode.
 #ifndef DISABLE_TRELLISQ_SEARCH
-#define DISABLE_TRELLISQ_SEARCH 1
+#define DISABLE_TRELLISQ_SEARCH 0
 #endif
 
 static const double ADST_FLIP_SVM[8] = {