Temporarily disables HCC_OPT_FLUSH

Change-Id: I290791e58dd52ab3823f6c3315e42b0d386e9d64

hipamd/src/hip_hcc.cpp

@@ -96,7 +96,7 @@ int HIP_SYNC_NULL_STREAM = 1;
 
 // HIP needs to change some behavior based on HCC_OPT_FLUSH :
 // TODO - set this to 1
-int HCC_OPT_FLUSH = 1;
+int HCC_OPT_FLUSH = 0;