Fix Mercurial directory hieracrchy

This is an update to 2c5e675 Files in the base directory of Mercurial
were getting copied into a subdirectory of the same name as the file
(e.g. Mercurial/hg was being copied to Mercurial/hg/hg).

There are other places in build.mono.proj where 
%(RecursiveDir)%(Filename)%(Extension) are used and they are not
exhibiting this problem.  I attempted to remove %(Filename)%(Extension) in
those cases and the build broke.

This may be a bug in xbuild or Copy task implementation.

Change-Id: Ie07cfd9ac5d353e7f87c4bfd2ad6498a1d3107ab
Add ~/pbuilder to the mapped directories

When using a Vagrant VM for testing installs, need access to built
deb files.

Change-Id: Ia9ae736f61e737a9294be179a922704c68a663b1
Update buildupdate.win.sh w/ ChorusMergeModule.msm

Windows Installer needs the ChorusMergeModule.msm

Change-Id: I768aefa9677e425b7566312cc3821b8f72d46fd9