Build kmap.h as part of a build process

inputd/build.sh

@@ -1,3 +1,4 @@
 #!/bin/sh
 
+php map-to-c.php factory-keymap.txt > kmap.h
 gcc -o ppkbd main.c || exit 1

inputd/map-to-c.php

@@ -21,7 +21,7 @@
  */
 
 $pmap = file_get_contents("physical-map.txt");
-$kmap = file_get_contents("factory-keymap.txt");
+$kmap = file_get_contents($argv[1]);
 
 // high nibble = row, low nibble col
 $el_phys_map = [];