[binutils-gdb] Change selttest.c to use use std::vector

[sergiodj+buildbot at sergiodj dot net]

*** TEST RESULTS FOR COMMIT 816d7b53047bca81c226990bc9248d59d80d4b8b ***

Author: Tom Tromey <tom@tromey.com>
Branch: master
Commit: 816d7b53047bca81c226990bc9248d59d80d4b8b

Change selttest.c to use use std::vector

This patch changes selftest.c to use std::vector rather than VEC.
I think this is a small net plus.

2016-10-12  Tom Tromey  <tom@tromey.com>

	* selftest.c: Include <vector>, not "vec.h".
	(self_test_function_ptr): Remove.
	(tests): Now a std::vector.
	(register_self_test, run_self_tests): Update.