vartest.c contains varformat.c tests

[Benjamin Arai]

Hi,

A bug was submitted (http://bugs.winehq.org/show_bug.cgi?id=5306) that
vartest.c was getting too large and that it needs to be smaller.  I don't
think to much can be done about the size but I did notice that all the tests
for varformat.c are being put into vartest.c as opposed to making a new test
file test/varformat.c.  Would there be any problems if I create a new test
file for varformat.c and move the appropriate test from vartest.c to it?