packaging: split vgpu perception into separate libvgpu-perception0 + -dev packages

- the vmsig package no longer ships the gpu lib; it is a Sensor lib for the control, not the daemon
- vgpu-perception gets SOVERSION; runtime (libvgpu-perception0) and dev (-dev) packages, like the vmie split
- per-component install + a 3-package make deb; fix a stale comment (the windows producer is in-tree)

packaging/deb/vgpu-dev/control.in

@@ -0,0 +1,10 @@
+Package: libvgpu-perception-dev
+Version: @VERSION@
+Section: libdevel
+Priority: optional
+Architecture: amd64
+Depends: @DEPENDS@
+Maintainer: @MAINTAINER@
+Description: Host-side vgpu perception library (development files)
+ Headers (vgpu_perception.h, vgpu_stream.h) and the linker namelink for
+ libvgpu-perception. Install this to build a control/shell against the perception API.