allow disabling status checks during builds

export LBMK_STATUS=n

if not set, the status checks and confirmation dialogs
persist. if set to y they persist.

if you set it to n, all checks are disabled, so e.g.:

./build roms all

this would once again build all targets, regardless
of status. this is if you want the old behaviour.

Signed-off-by: Leah Rowe <leah@libreboot.org>

script/build/roms

@@ -190,7 +190,7 @@ skip_board()
 		return 1
 
 	if [ "$lbmk_release" != "y" ] && [ "$status" != "stable" ] && \
-	    [ "$status" != "$release_type" ]; then
+	    [ "$status" != "$release_type" ] && [ "$lbmk_status" = "y" ]; then
 		if [ -f "$targetdir/warn.txt" ]; then
 			printf "Regarding board '%s' (status '%s'):\n" \
 			    "$board" "$status"