[test] Clean up previous raw profile before merging into it

This fixes a test failure in instrprof-set-file-object-merging.c which
seems to have been caused by reuse of stale data in old raw profiles.

git-svn-id: https://llvm.org/svn/llvm-project/compiler-rt/trunk@372041 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/test/profile/instrprof-set-file-object-merging.c b/test/profile/instrprof-set-file-object-merging.c
index 3f71a81..0ca5f6f 100644
--- a/test/profile/instrprof-set-file-object-merging.c
+++ b/test/profile/instrprof-set-file-object-merging.c
@@ -1,12 +1,12 @@
 // Test that the specified output merges the profiling data.
 // Run the program twice so that the counters accumulate.
 // RUN: %clang -fprofile-instr-generate -fcoverage-mapping -o %t %s
+// RUN: rm -f %t.merging.profraw %t.merging.profdata
 // RUN: %run %t %t.merging.profraw
 // RUN: %run %t %t.merging.profraw
 // RUN: test -f %t.merging.profraw
 // RUN: llvm-profdata merge -o %t.merging.profdata %t.merging.profraw
 // RUN: llvm-cov show -instr-profile %t.merging.profdata %t | FileCheck %s --match-full-lines
-// RUN: rm %t.merging.profdata %t.merging.profraw
 #include <stdio.h>
 
 extern void __llvm_profile_set_file_object(FILE *, int);