Fix builds/msvc/Makefile.am to include all properties files in the build

I attempted to fix up the properties files manifests in the Makefile,
but neglected the end-of-line escape characters.  It was good enough
to pass whatever make dist on Linux did, but I had no Windows build
env to test in.  The broken change was in commit de4a442.

Signed-off-by: Dan Mick <dan.mick@inktank.com>