based on a patch provided by Aaron Patterson.

	assertions.rb: success option

	* test/lib/test/unit/assertions.rb (assert_in_out_err): add
  success option to check the exit status.
	* iseq.c (iseqw_s_compile_file): deal with syntax error as well as
	  compile, and should not abort when rescued.


git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/branches/ruby_2_3@56838 b2dd03c8-39d4-4d8f-98ff-823fe69b080e