target/sdk: use .config instead of unconditionally enabling all build dirs

Call make defconfig on every build to catch newly added packages

Signed-off-by: Felix Fietkau <nbd@openwrt.org>

SVN-Revision: 39913

target/sdk/convert-config.pl

@@ -1,6 +1,13 @@
 #!/usr/bin/env perl
 use strict;
 
+print <<EOF;
+config ALL
+	bool
+	default y
+
+EOF
+
 while (<>) {
 	chomp;
 	next unless /^CONFIG_([^=]+)=(.*)$/;
@@ -9,6 +16,8 @@ while (<>) {
 	my $val = $2;
 	my $type;
 
+	next if $var eq 'ALL';
+
 	if ($val eq 'y') {
 		$type = "bool";
 	} elsif ($val eq 'm') {