This will make GTK_HOST defined more like what it is on Meson builds, so that
we set the host string appropriately according to the build that is being
carried out, instead of defaulting to i686-pc-vsXX for all builds.
Like the previous commit on win32/config-msvc.mak.in, this now sets GTK_HOST
to be:
i686-pc-vsXX for 32-bit x86 builds
x86_64-pc-vsXX for x64 builds
aarch64-pc-vsXX for ARM64 builds (requires VS2017 15.9.x or later)
Look in the include/harfbuzz directory that is under the pre-defined prefix
directory, as Pango 1.44.x and later pulled in HarfBuzz headers for all builds
This way, we can enable the built binaries to print out diagnostic
messages as needed by the values we set via the envvar GDK_DEBUG.
The release configs of the Visual Studio project files follow the
settings of Meson's `debugoptimized` build settings.
