[gnome-flashback] output: add name getter

[Alberts Muktupāvels <muktupavels src gnome org>]

commit 1bb913ecc68b383f86e2335e9ffcd9072d60261c
Author: Alberts Muktupāvels <alberts muktupavels gmail com>
Date:   Wed Jul 8 09:07:50 2020 +0300

    output: add name getter
    
    Based on mutter commit:
    https://gitlab.gnome.org/GNOME/mutter/-/commit/9bf6faf6392528c60b35

 backends/gf-output-private.h | 2 ++
 backends/gf-output.c         | 6 ++++++
 2 files changed, 8 insertions(+)
---
diff --git a/backends/gf-output-private.h b/backends/gf-output-private.h
index 11a811e..2632fff 100644
--- a/backends/gf-output-private.h
+++ b/backends/gf-output-private.h
@@ -103,6 +103,8 @@ uint64_t            gf_output_get_id                    (GfOutput           *sel
 
 GfGpu              *gf_output_get_gpu                   (GfOutput           *output);
 
+const char         *gf_output_get_name                  (GfOutput           *self);
+
 void                gf_output_assign_crtc               (GfOutput           *output,
                                                          GfCrtc             *crtc,
                                                          const GfOutputInfo *output_info);
diff --git a/backends/gf-output.c b/backends/gf-output.c
index 00d8880..3251b54 100644
--- a/backends/gf-output.c
+++ b/backends/gf-output.c
@@ -218,6 +218,12 @@ gf_output_get_gpu (GfOutput *output)
   return priv->gpu;
 }
 
+const char *
+gf_output_get_name (GfOutput *self)
+{
+  return self->name;
+}
+
 void
 gf_output_assign_crtc (GfOutput           *self,
                        GfCrtc             *crtc,