Add a try/catch, in case an -armv5 style argument does not match an expected ARM architecture

tools/CommandLineTools.hx

@@ -1658,6 +1658,8 @@ class CommandLineTools {
 					
 					if (argument.substr (0, 4) == "-arm") {
 						
+						try {
+							
 							var name = argument.substr (1).toUpperCase ();
 							var value = Type.createEnum (Architecture, name);
 							
@@ -1667,6 +1669,8 @@ class CommandLineTools {
 								
 							}
 							
+						} catch (e:Dynamic) {}
+						
 					} else if (argument == "-64") {
 						
 						overrides.architectures.push (Architecture.X64);