swr: [rasterizer jitter] include cstdarg in builder_misc.cpp

Fixes build problem with llvm-svn.

v2: use cstdarg instead of stdarg.h

Reviewed-by: Bruce Cherniak <bruce.cherniak@intel.com>

src/gallium/drivers/swr/rasterizer/jitter/builder_misc.cpp

@@ -30,6 +30,7 @@
 #include "builder.h"
 #include "common/rdtsc_buckets.h"
 
+#include <cstdarg>
 
 namespace SwrJit
 {
@@ -1623,4 +1624,4 @@ namespace SwrJit
         }
     }
 
-}
+}