[binutils-gdb] C++ify mi_parse

[sergiodj+buildbot@sergiodj.net]

*** TEST RESULTS FOR COMMIT 4d89769a7b4e38e94a6e027281b36eff71fc8214 ***

Author: Tom Tromey <tom@tromey.com>
Branch: master
Commit: 4d89769a7b4e38e94a6e027281b36eff71fc8214

C++ify mi_parse

This changes mi_parse to return a unique_ptr, and to use "new"; then
fixes up the users.  This allows removing one cleanup.

gdb/ChangeLog
2017-04-12  Tom Tromey  <tom@tromey.com>

	* mi/mi-parse.h (struct mi_parse): Add constructor, destructor.
	(mi_parse): Update return type.
	(mi_parse_free): Remove.
	* mi/mi-parse.c (mi_parse::mi_parse): New constructor.
	(mi_parse::~mi_parse): Rename from mi_parse_free.
	(mi_parse_cleanup): Remove.
	(mi_parse): Return a unique_ptr.  Use new.
	* mi/mi-main.c (mi_execute_command): Update.