GTK+-3.89.0 and later will require C99 features that is only supported on
Visual Studio 2013 and later, so prepare build/Makefile.msvcproj for this.
We still keep the 2008~2010 stuff here as this strives to be a shared module,
and there are projects using this that still supports building on pre-2013
Visual Studio.
Make the Makefile.am targets for generating the Visual Studio projects re-generate the
project files and the header listings whenever the Makefile.am's that include
build/Makefile.msvcproj changes, so that whenever a source/header is added, they will
be reflected in the projects and in the property sheets that are used to copy the
headers.
Also ensure that these are applied to the vs11, vs12 and vs14 projects when this
happens, as they are copied and processed from the Visual Studio 2010 projects.
This adds a common autotools module that can be used by various projects to
generate the Visual Studio projects as needed, and if necessary, generate
the headers listings to "install" for that project, based on items passed
in to this. This is modeled on the Makefile.introspection autotools file
that is used by many GNOME projects to generate the introspection files.
https://bugzilla.gnome.org/show_bug.cgi?id=681965
