m/n/build: fix incorrect device number

The device node major number for our console device is wrong.
The major number for the console device is 5, not 1 as seen in
Documentation/admin-guide/serial-console.rst.

I stumbled upon this when looking at this spec as a reference for an
issue with an unrelated device.

Change-Id: Icbae264d2b4a5dc8770cb1e15e33d56c504a50c5
Reviewed-on: https://review.monogon.dev/c/monogon/+/1126
Reviewed-by: Leopold Schabel <leo@monogon.tech>
Tested-by: Jenkins CI
diff --git a/metropolis/node/build/earlydev.fsspec b/metropolis/node/build/earlydev.fsspec
index 0e88e43..1e32803 100644
--- a/metropolis/node/build/earlydev.fsspec
+++ b/metropolis/node/build/earlydev.fsspec
@@ -8,7 +8,7 @@
 special_file <
     path: "/dev/console"
     type: CHARACTER_DEV
-    major: 1 minor: 1
+    major: 5 minor: 1
     mode: 0600 uid: 0 gid: 0
 >
 special_file <