Two modifications:
1. The addition of 2013 to the copyright year range for every file;
2. The use of a single year range, instead of potentially multiple
year ranges, as approved by the FSF.
(mips_irix_init_abi): Call set_solib_ops.
* solib-irix.c: Include "solib.h" and "solib-irix.h".
(irix_so_ops): Make global.
(_initialize_irix_solib): Do not set current_target_so_ops.
* solib-irix.h: New file.
* Makefile.in: Update dependencies.