1.0.10dev: increase clone depth on AppVeyor.
1.0.10dev: increase clone depth on AppVeyor.

A clone depth of 1, while enough for the build itself,
is not going to work if the commit being build is no
longer the most recent one, as it seems the checkout
will be done on the branch and not on the commit itself.


git-svn-id: 50cd48c816abc7a9f40e8e03a4277466cb30a3e4@14496 af82e41b-90c4-0310-8c96-b1721e28e2e2

rbaumg/trac,rbaumg/trac,rbaumg/trac,rbaumg/trac