CLI: Invoke gmake on FreeBSD when using `qmk compile`.

* Current makefiles aren't portable, so invoke gmake on FreeBSD.

lib/python/qmk/commands.py

@@ -28,11 +28,16 @@ def create_make_command(keyboard, keymap, target=None):
         A command that can be run to make the specified keyboard and keymap
     """
     make_args = [keyboard, keymap]
+    make_cmd = 'make'
+
+    platform_id = platform.platform().lower()
+    if 'freebsd' in platform_id:
+        make_cmd = 'gmake'
 
     if target:
         make_args.append(target)
 
-    return ['make', ':'.join(make_args)]
+    return [make_cmd, ':'.join(make_args)]
 
 
 def compile_configurator_json(user_keymap, bootloader=None):