Use Path instead of Config->OutputFile. NFC.

This function is always called with Config->OutputFile. That is not
obvious from reading the function. It should always use Path or take
no argument and always use Config->OutputFile.

llvm-svn: 317536
diff --git a/lld/ELF/Filesystem.cpp b/lld/ELF/Filesystem.cpp
index 35310b0..8848014 100644
--- a/lld/ELF/Filesystem.cpp
+++ b/lld/ELF/Filesystem.cpp
@@ -38,8 +38,8 @@
 // This function spawns a background thread to call unlink.
 // The calling thread returns almost immediately.
 void elf::unlinkAsync(StringRef Path) {
-  if (!ThreadsEnabled || !sys::fs::exists(Config->OutputFile) ||
-      !sys::fs::is_regular_file(Config->OutputFile))
+  if (!ThreadsEnabled || !sys::fs::exists(Path) ||
+      !sys::fs::is_regular_file(Path))
     return;
 
   // First, rename Path to avoid race condition. We cannot remove