Rebuild all mex files for 32-Bit Matlab on Linux.

This is hopefully the final rebuild before end-of-life for 32-Bit
Matlab on Linux.
Built on Ubuntu 12.10 with Matlab R2007a (V7.4).
Only Datapixx was not rebuilt, but its last rebuild was also on same
system config.

-> These mex files should work on at least Ubuntu 12.04 LTS and later.