Skipping fill_char_pair_vector test on AMD

The test fails for the same reason that fill_pair_vector does.

See: c085d64a46b315bf9e884283d6b980b2191b72bc
See: http://devgurus.amd.com/thread/166622

closes: #2
Merge pull request #12 from ddemidov/master

Skip fill_char_pair_vector test on AMD