[libFuzzer] Fix typo in merge-sigusr.test.
@@ -15,7 +15,7 @@ RUN: echo e > %t/C2/e
RUN: echo f > %t/C2/f
RUN: echo g > %t/C2/g
-RUN: %run %t/LFSIGUSR -merge=1 -merge_control_file=%t/MCF %t/C1 %t/C2 2>%t/log 2>%t/log & export PID=$!
+RUN: %run %t/LFSIGUSR -merge=1 -merge_control_file=%t/MCF %t/C1 %t/C2 2>%t/log & export PID=$!
RUN: sleep 3
RUN: pkill -SIGUSR2 -P $PID
RUN: sleep 3
