internal/pipewire: integrate pw_security_context

This is required for securely providing access to PipeWire.

This change has already been manually tested and confirmed to work correctly.

This unfortunately cannot be upstreamed in its current state as libpipewire-0.3 breaks static linking.

Signed-off-by: Ophestra <cat@gensokyo.uk>

hst/hst.go

@@ -56,6 +56,8 @@ type Paths struct {
 type Info struct {
 	// WaylandVersion is the libwayland value of WAYLAND_VERSION.
 	WaylandVersion string `json:"WAYLAND_VERSION"`
+	// PipeWireVersion is the pipewire value of pw_get_headers_version().
+	PipeWireVersion string `json:"pw_get_headers_version"`
 
 	// Version is a hardcoded version string.
 	Version string `json:"version"`