Add Debian in instructions, too

eddyp · eddyp · commit be1780fdd820 · 2019-02-03T16:25:35.000+02:00
Signed-off-by: Eddy Petrișor &lt;eddy.petrisor@gmail.com&gt;
diff --git a/src/preface.md b/src/preface.md
@@ -100,7 +100,7 @@ $ # QEMU
 $ sudo apt install qemu-system-arm
 ```
 
-#### Ubuntu 18.04
+#### Ubuntu 18.04 or Debian
 
 ``` console
 $ # gdb-multiarch -- use `gdb-multiarch` when you wish to invoke gdb
