Minor Native Client specific changes to files in src.

src/d8.cc

Index: src/d8.cc
diff --git a/src/d8.cc b/src/d8.cc
index b57e3907ce9eee32940038e6aaf9d7dd2935cadf..385aa03c91d379c4008332c3cf4f905a04c20342 100644
--- a/src/d8.cc
+++ b/src/d8.cc
@@ -144,6 +144,11 @@ class DumbLineEditor: public LineEditor {
 
 Handle<String> DumbLineEditor::Prompt(const char* prompt) {
   printf("%s", prompt);
+#if defined(__native_client__)
+  // Native Client libc is used to being embedded in Chrome and
+  // has trouble recognizing when to flush.
+  fflush(stdout);
+#endif
   return Shell::ReadFromStdin(isolate_);
 }