Use empty parens for empty function parameter list instead of '(void)'.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@168049 91177308-0d34-0410-b5e6-96231b3b80d8

lib/Transforms/Utils/MetaRenamer.cpp

@@ -37,7 +37,7 @@ namespace {
       next = seed;
     }
 
-    int rand(void) {
+    int rand() {
       next = next * 1103515245 + 12345;
       return (unsigned int)(next / 65536) % 32768;
     }