[libFuzzer] Fix flaky merge.test.
@@ -58,7 +58,7 @@ MERGE_WITH_CRASH: MERGE-OUTER: succesfull in 2 attempt(s)
MERGE_WITH_CRASH: MERGE-OUTER: 3 new files
# Check that we actually limit the size with max_len
-RUN: rm %t/T1/*
+RUN: rm %t/T1/* %t/T2/*
RUN: echo 'FUZZER' > %t/T2/FUZZER
RUN: %t-FullCoverageSetTest -merge=1 %t/T1 %t/T2 -max_len=5 2>&1 | FileCheck %s --check-prefix=MERGE_LEN5
RUN: not grep FUZZER %t/T1/*
