test-patchset: Make a copy of the typo dictionary

test-patchset: Make a copy of the typo dictionary

Currently aiaiai issues the following warning for each patch under test:
No typos will be found - file '/tmp/aiaiai-test-patchset.32BU/checkpatch/spellin
g.txt': No such file or directory

In fact the problem can even more acute when testing older kernels that do not
have this patch:
  https://lkml.org/lkml/2014/10/22/609

This patch fixes the problem by copying out the typo dictionary if one is
found.

Signed-off-by: Daniel Thompson <daniel.thompson@linaro.org>
Tested-by: Lee Jones <lee.jones@linaro.org>