Fix bug reported and analyzed by Olivier Crete:

Fix bug reported and analyzed by Olivier Crete:
* symfile.c (copy_section_addr_info): New function.
(symbol_file_add_with_addrs_or_offsets): Use it to save the
original set of address arguments, instead of handwritten code
that uses one length to allocate and a different length to
initialize.  Use make_cleanup_free_section_addr_info.
* symfile.h (copy_section_addr_info): New declaration.
* utils.c: #include "symfile.h".
(do_free_section_addr_info, make_cleanup_free_section_addr_info):
New functions.
* defs.h (make_cleanup_free_section_addr_info): New declaration.
* Makefile.in (utils.o): Update dependencies.