[patch] Fix distributed maxval bug, split large tests

[Jules Bergmann]

This patch fixes a bug causing distributed maxval not to work with 
matrices and tensors.

It also splits apart several large tests (coverage_unary and fft) into 
smaller tests.

Patch applied.

-- 
Jules Bergmann
CodeSourcery
jules at codesourcery.com
(650) 331-3385 x705
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