Handle nsarray setting type in root settings-header.pl

The fork's settings.dat declares recent_snapshots with type nsarray (a
Cocoa NSArray). fusepb/settings-header.pl handles this; the root parser
only knew boolean/numeric/string/null and died with "Unknown setting
type 'nsarray'" when invoked by autotools-driven CI builds for non-Cocoa
UI variants. Treat nsarray as 'do nothing' -- non-Cocoa builds don't
need the setting in their settings_info struct.

Author: morozov

settings-header.pl

@@ -80,6 +80,8 @@
 	print "   int $name;\n";
     } elsif( $type eq 'string' ) {
 	print "  char *$name;\n";
+    } elsif( $type eq 'nsarray' ) {
+	# Do nothing
     } elsif( $type eq 'null' ) {
 	# Do nothing
     } else {