Avoid int to string conversion in Twine or raw_ostream contexts.

Some output changes from uppercase hex to lowercase hex, no other functionality change intended.

llvm-svn: 321526
diff --git a/llvm/lib/TableGen/Main.cpp b/llvm/lib/TableGen/Main.cpp
index fc9d0cc..be35f89 100644
--- a/llvm/lib/TableGen/Main.cpp
+++ b/llvm/lib/TableGen/Main.cpp
@@ -110,7 +110,7 @@
     return 1;
 
   if (ErrorsPrinted > 0)
-    return reportError(argv0, utostr(ErrorsPrinted) + " errors.\n");
+    return reportError(argv0, Twine(ErrorsPrinted) + " errors.\n");
 
   // Declare success.
   Out.keep();