[binutils-gdb] C++ify charsets

[sergiodj+buildbot at sergiodj dot net]

*** TEST RESULTS FOR COMMIT ccb2231cd848c89f04ab2e1e54b013d69ea34893 ***

Author: Simon Marchi <simon.marchi@polymtl.ca>
Branch: master
Commit: ccb2231cd848c89f04ab2e1e54b013d69ea34893

C++ify charsets

This patch makes the charset list an std::vector instead of a VEC.
Because we must have access to the raw pointers as a simple array, we
can't use a vector of unique_ptr/unique_xmalloc_ptr.  Therefore, wrap
the vector in a simple class to facilitate the cleanup.  This allows
removing one usage of free_char_ptr_vec.

gdb/ChangeLog:

	* charset.c (struct charset_vector): New.
	(charsets): Change type to charset_vector.
	(find_charset_names): Adjust.
	(add_one): Adjust.
	(_initialize_charset): Adjust.