flip error and help message on failure

Flip the error and help message on failure.

Change-Id: Ib75d6df87a37411edd7283fdf7785e8d56e417ea
Signed-off-by: Patrick Venture <venture@google.com>
diff --git a/readd.cpp b/readd.cpp
index 3d0ea01..7ac95fc 100644
--- a/readd.cpp
+++ b/readd.cpp
@@ -24,8 +24,7 @@
 
 static void exit_with_error(const std::string& help, const char* err)
 {
-    std::cerr << help << std::endl;
-    std::cerr << "ERROR: " << err << std::endl;
+    std::cerr << "ERROR: " << err << std::endl << help << std::endl;
     exit(-1);
 }