Log Message:
Update to ECL 9.8.4:

* Bugs fixed:

 - si_{set,get}_finalizer were not exported from ecl.dll and thus the library
   TRIVIAL-GARBAGE failed to build in Windows

 - The MSVC port did not define @ECL_LDRPATH@ and failed to build ecl.dll

 - The sequence functions did not understand the newest specialized array types.

* Visible changes:

 - The configuration flag --with-__thread now defaults to NO because many
   platforms do not support it and GCC does not complain, making reliable
   detection impossible.

 - For further compatibility with SBCL, ECL now supports two additional
   buffer types :FULL and :LINE which are compatible with :FULLY-BUFFERED
   and :LINE-BUFFERED (Thanks to Matthew Mondor)

 - The sockets library can now be loaded using either (REQUIRE 'SOCKETS)
   or (REQUIRE 'SB-BSD-SOCKETS).