scripted-diff: Avoid `interface` keyword to fix windows gitian build

Rename `interface` to `interfaces`

Build failure reported by Chun Kuan Lee <ken2812221@gmail.com>
https://github.com/bitcoin/bitcoin/pull/10244#issuecomment-379434756

-BEGIN VERIFY SCRIPT-

git mv src/interface src/interfaces
ren() { git grep -l "$1" | xargs sed -i "s,$1,$2,g"; }
ren interface/            interfaces/
ren interface::           interfaces::
ren BITCOIN_INTERFACE_    BITCOIN_INTERFACES_
ren "namespace interface" "namespace interfaces"

-END VERIFY SCRIPT-

1 files changed, 2 insertions, 2 deletions

diff --git a/src/qt/utilitydialog.h b/src/qt/utilitydialog.h
index e6ad7be5d0..f5c8af4362 100644
--- a/src/qt/utilitydialog.h
+++ b/src/qt/utilitydialog.h
@@ -10,7 +10,7 @@
 
 class BitcoinGUI;
 
-namespace interface {
+namespace interfaces {
     class Node;
 }
 
@@ -24,7 +24,7 @@ class HelpMessageDialog : public QDialog
     Q_OBJECT
 
 public:
-    explicit HelpMessageDialog(interface::Node& node, QWidget *parent, bool about);
+    explicit HelpMessageDialog(interfaces::Node& node, QWidget *parent, bool about);
     ~HelpMessageDialog();
 
     void printToConsole();