Improve dumb terminal support (emacs is dumb).

Bug: http://b/26444032
Change-Id: Iaff4b09b613fd30ab7c4c73e096da34f37e0de07
diff --git a/adb/line_printer.cpp b/adb/line_printer.cpp
index e8fe6c9..4ec8979 100644
--- a/adb/line_printer.cpp
+++ b/adb/line_printer.cpp
@@ -67,7 +67,7 @@
 
 void LinePrinter::Print(string to_print, LineType type) {
   if (!smart_terminal_) {
-    Out(to_print);
+    Out(to_print + "\n");
     return;
   }