change the expected error messages in test.sh for the updated mrb_exc_inspect() in mruby/src/error.c

See mruby/mruby@333c364d5d   error.c (mrb_exc_inspect): Update format to match CRuby
See also ruby/ruby@022ab41   [DOC] Improve Errno and SystemCallError.new

Author: t-nissie

test/test.sh

@@ -50,8 +50,8 @@ Foo::dtor()'
 run module 'modfunc called: 1234'
 
 # Failure cases
-fail wrong_type "can't convert String into Fixnum, argument 1(1111) (TypeError)"
-fail wrong_arg_num "'square': wrong number of arguments (2 for 1) (ArgumentError)"
+fail wrong_type "#<TypeError: can't convert String into Fixnum, argument 1(1111)>"
+fail wrong_arg_num "#<ArgumentError: 'square': wrong number of arguments (2 for 1)>"
 
 ################################################################
 # All tests succeeded.