'unlink' file directly instead of invoking system shell.


git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@78026 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/utils/ccc-analyzer b/utils/ccc-analyzer
index df99437..f29c4d5 100755
--- a/utils/ccc-analyzer
+++ b/utils/ccc-analyzer
@@ -283,7 +283,7 @@
     }
   }
   
-  `rm -f $ofile`;
+  unlink($ofile);
 }
 
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