Improves presym scanning

The main purpose is to increase the chances of finding presym and to prevent errors due to C++11 lambda expressions.

- The argument to receive the class may be written, for example, `mrb_class_get()`.
- The argument that receives the implementation function of the method may be a C++ lambda expression.
  In this case, if multiple variable declarations are separated by colons, the preprocessor will recognize them as argument delimiters and report an error.
  This patch prevents it from happening.

  ```c++
  // When preprocessing...
  func([] { int x, y, z; })
    // ^^^^^^^^^^          1st argument?
    //             ^       2nd argument?
    //                ^^^^ 3rd argument?
  ```

include/mruby/presym/scanning.h

@@ -12,16 +12,22 @@
 #undef mrb_intern_lit
 #define mrb_intern_lit(mrb, name) MRB_PRESYM_SCANNING_TAGGED(name)
 #define mrb_intern_cstr(mrb, name) MRB_PRESYM_SCANNING_TAGGED(name)
-#define mrb_define_method(mrb, c, name, f, a) MRB_PRESYM_SCANNING_TAGGED(name)
-#define mrb_define_class_method(mrb, c, name, f, a) MRB_PRESYM_SCANNING_TAGGED(name)
-#define mrb_define_singleton_method(mrb, c, name, f, a) MRB_PRESYM_SCANNING_TAGGED(name)
-#define mrb_define_class(mrb, name, s) MRB_PRESYM_SCANNING_TAGGED(name)
-#define mrb_define_class_under(mrb, o, name, s) MRB_PRESYM_SCANNING_TAGGED(name)
+#define mrb_define_method(mrb, c, name, ...) MRB_PRESYM_SCANNING_TAGGED(name) (c) (__VA_ARGS__)
+#define mrb_define_class_method(mrb, c, name, ...) MRB_PRESYM_SCANNING_TAGGED(name) (c) (__VA_ARGS__)
+#define mrb_define_singleton_method(mrb, c, name, ...) MRB_PRESYM_SCANNING_TAGGED(name) (c) (__VA_ARGS__)
+#define mrb_define_class(mrb, name, s) MRB_PRESYM_SCANNING_TAGGED(name) (s)
+#define mrb_define_class_under(mrb, o, name, s) MRB_PRESYM_SCANNING_TAGGED(name) (o) (s)
 #define mrb_define_module(mrb, name) MRB_PRESYM_SCANNING_TAGGED(name)
-#define mrb_define_module_under(mrb, o, name) MRB_PRESYM_SCANNING_TAGGED(name)
-#define mrb_define_module_function(mrb, c, name, f, s) MRB_PRESYM_SCANNING_TAGGED(name)
-#define mrb_define_const(mrb, c, name, v) MRB_PRESYM_SCANNING_TAGGED(name)
-#define mrb_define_global_const(mrb, name, v) MRB_PRESYM_SCANNING_TAGGED(name)
+#define mrb_define_module_under(mrb, o, name) MRB_PRESYM_SCANNING_TAGGED(name) (o)
+#define mrb_define_module_function(mrb, c, name, ...) MRB_PRESYM_SCANNING_TAGGED(name) (c) (__VA_ARGS__)
+#define mrb_define_const(mrb, c, name, v) MRB_PRESYM_SCANNING_TAGGED(name) (c) (v)
+#define mrb_define_global_const(mrb, name, v) MRB_PRESYM_SCANNING_TAGGED(name) (v)
+#define mrb_define_alias(mrb, c, a, b) MRB_PRESYM_SCANNING_TAGGED(a) MRB_PRESYM_SCANNING_TAGGED(b) (c)
+#define mrb_class_get(mrb, name) MRB_PRESYM_SCANNING_TAGGED(name)
+#define mrb_class_get_under(mrb, outer, name) MRB_PRESYM_SCANNING_TAGGED(name) (outer)
+#define mrb_module_get(mrb, name) MRB_PRESYM_SCANNING_TAGGED(name)
+#define mrb_module_get_under(mrb, outer, name) MRB_PRESYM_SCANNING_TAGGED(name) (outer)
+#define mrb_funcall(mrb, v, name, ...) MRB_PRESYM_SCANNING_TAGGED(name) (v) (__VA_ARGS__)
 
 #define MRB_OPSYM(name) MRB_OPSYM__##name(mrb)
 #define MRB_CVSYM(name) MRB_PRESYM_SCANNING_TAGGED("@@" #name)