[gnome-builder] build: add post-install phase for clang/llvm deps

[Christian Hergert <chergert src gnome org>]

commit 1d3968b12fd0ff87b42fadabfcb0cd2021e6bcc8
Author: Christian Hergert <chergert redhat com>
Date:   Fri Sep 3 10:30:04 2021 -0700

    build: add post-install phase for clang/llvm deps

 build-aux/flatpak/org.gnome.Builder.json | 7 +++++++
 1 file changed, 7 insertions(+)
---
diff --git a/build-aux/flatpak/org.gnome.Builder.json b/build-aux/flatpak/org.gnome.Builder.json
index 6e79abe12..d7fd80aa4 100644
--- a/build-aux/flatpak/org.gnome.Builder.json
+++ b/build-aux/flatpak/org.gnome.Builder.json
@@ -665,6 +665,13 @@
                     "type" : "git",
                     "url" : "https://gitlab.gnome.org/GNOME/gnome-builder.git";
                 }
+            ],
+            "post-install" : [
+                "cp -a /usr/lib/sdk/llvm12/bin/* /app/bin/",
+                "cp -a /usr/lib/sdk/llvm12/lib/* /app/lib/",
+                "cp -a /usr/lib/sdk/llvm12/libexec/* /app/libexec/",
+                "cp -a /usr/lib/sdk/llvm12/include/* /app/include/",
+                "cp -a /usr/lib/sdk/llvm12/share/* /app/share/"
             ]
         }
     ]