Emacs: Change keybinding for my/launch-gdb().

It conflicted with magit.

init.d/programming/c++.el

@@ -1,6 +1,6 @@
 ;;; c++.el --- C++ settings. -*- lexical-binding: t; -*-
 
-;; Time-stamp: <2020-03-27T17:10:21+0100>
+;; Time-stamp: <2020-03-27T20:28:58+0100>
 
 ;;; Commentary:
 
@@ -106,7 +106,7 @@
 
   :bind
   (:map c-mode-base-map
-        ("C-c g" . my/launch-gdb)
+        ("C-c C-g" . my/launch-gdb)
         ("M-<down>" . nil)         ; Disabled, because I use them for scrolling.
         ("M-<up>" . nil))          ; ^ FIXME: Does not work. ^
   )