Eyelink: Rebuild for Linux with raw access enabled on 32-Bit.

The raw sample access functions eyelink_get_extra_raw_values() and
eyelink_get_extra_raw_values_v2() are only available for 32-Bit Linux,
not for 64-Bit, despite the same v1.9 (25th March 2011) eyelink_core
library.

Enable support for those functions on 32-Bit Matlab/Octave builds for
Linux, but disable it for 64-Bit Matlab/Octave buids, to prevent load
time failure due to undefined symbols.

-> Eyelink mex files for 32/64-Bit Linux, Octave and Matlab rebuilt for
consistency.