Fix some uses of fprintf/stderr without a prototype.

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@89858 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/lib/Frontend/FrontendActions.cpp b/lib/Frontend/FrontendActions.cpp
index 7a7537b..3a2f570 100644
--- a/lib/Frontend/FrontendActions.cpp
+++ b/lib/Frontend/FrontendActions.cpp
@@ -199,7 +199,7 @@
   RawLex.LexFromRawLexer(RawTok);
   while (RawTok.isNot(tok::eof)) {
     PP.DumpToken(RawTok, true);
-    fprintf(stderr, "\n");
+    llvm::errs() << "\n";
     RawLex.LexFromRawLexer(RawTok);
   }
 }
@@ -212,7 +212,7 @@
   do {
     PP.Lex(Tok);
     PP.DumpToken(Tok, true);
-    fprintf(stderr, "\n");
+    llvm::errs() << "\n";
   } while (Tok.isNot(tok::eof));
 }