Add "-build-mode:dynamic" to the "odin help build" output

src/main.cpp

@@ -2199,6 +2199,7 @@ gb_internal void print_show_help(String const arg0, String const &command) {
 		print_usage_line(3, "-build-mode:test        Builds as an executable that executes tests.");
 		print_usage_line(3, "-build-mode:dll         Builds as a dynamically linked library.");
 		print_usage_line(3, "-build-mode:shared      Builds as a dynamically linked library.");
+		print_usage_line(3, "-build-mode:dynamic     Builds as a dynamically linked library.");
 		print_usage_line(3, "-build-mode:lib         Builds as a statically linked library.");
 		print_usage_line(3, "-build-mode:static      Builds as a statically linked library.");
 		print_usage_line(3, "-build-mode:obj         Builds as an object file.");