[gnome-sdk-images] Add /usr/lib/os-release

[Matthias Clasen <matthiasc src gnome org>]

commit 149e8985adc4a0e15d7de04376bcd36ba4d43eb4
Author: Matthias Clasen <mclasen redhat com>
Date:   Sat Sep 24 17:04:39 2016 -0400

    Add /usr/lib/os-release
    
    Some tools (such as gnome-software) rely on this file.

 Makefile              |    2 +-
 org.gnome.Sdk.json.in |   14 ++++++++++++++
 os-release-configure  |    9 +++++++++
 os-release.in         |    4 ++++
 4 files changed, 28 insertions(+), 1 deletions(-)
---
diff --git a/Makefile b/Makefile
index 51a9016..3eefec7 100644
--- a/Makefile
+++ b/Makefile
@@ -11,7 +11,7 @@ SDK_BRANCH=master
 SDK_RUNTIME_VERSION=1.4
 
 # Canned recipe for generating metadata
-SUBST_FILES=org.gnome.Sdk.json metadata.sdk metadata.platform
+SUBST_FILES=org.gnome.Sdk.json metadata.sdk metadata.platform os-release
 define subst-metadata
        @echo -n "Generating files: ${SUBST_FILES}... ";
        @for file in ${SUBST_FILES}; do                                         \
diff --git a/org.gnome.Sdk.json.in b/org.gnome.Sdk.json.in
index e6d40bc..fe41b58 100644
--- a/org.gnome.Sdk.json.in
+++ b/org.gnome.Sdk.json.in
@@ -800,6 +800,20 @@
                     "url": "git://git.gnome.org/gcr"
                 }
             ]
+        },
+        {
+            "name": "os-release",
+            "sources": [
+                {
+                    "type": "file",
+                    "path": "os-release"
+                },
+                {
+                    "type": "file",
+                    "path": "os-release-configure",
+                    "dest-filename": "configure"
+                }
+            ]
         }
     ]
 }
diff --git a/os-release-configure b/os-release-configure
new file mode 100644
index 0000000..363795f
--- /dev/null
+++ b/os-release-configure
@@ -0,0 +1,9 @@
+#!/bin/sh
+
+cat <<EOF > Makefile
+all:
+
+install:
+       mkdir -p $(DESTDIR)/usr/lib
+        install os-release $(DESTDIR)/usr/lib
+EOF
diff --git a/os-release.in b/os-release.in
new file mode 100644
index 0000000..477b6a5
--- /dev/null
+++ b/os-release.in
@@ -0,0 +1,4 @@
+NAME=GNOME
+VERSION=@@SDK_BRANCH@@ (Flatpak runtime)
+VERSION_ID=@@SDK_BRANCH@@
+ID=org.gnome.Platform