Flatpak: Use ScmRevGen to generate metainfo XML

Flatpak/fill_release_node.sh

@@ -1,8 +0,0 @@
-#!/usr/bin/env bash
-
-DATE=$(git log -1 --pretty=%cd --date=iso8601 --date=format:'%Y-%m-%d')
-sed -i -e "s/@DATE_PLACEHOLDER/${DATE}/" ../org.DolphinEmu.dolphin-emu.metainfo.xml
-VERSION=$(git describe --tags | sed -E 's/^([0-9]+-[0-9]+).*/\1/')
-sed -i -e "s/@VERSION_PLACEHOLDER/${VERSION}/" ../org.DolphinEmu.dolphin-emu.metainfo.xml
-
-

Flatpak/org.DolphinEmu.dolphin-emu.metainfo.xml.in

@@ -36,7 +36,7 @@
     <id>dolphin-emu.desktop</id>
   </provides>
   <releases>
-    <release version="@VERSION_PLACEHOLDER" date="@DATE_PLACEHOLDER"/>
+    <release version="${DOLPHIN_WC_DESCRIBE}" date="${DOLPHIN_WC_BUILD_DATE}"/>
   </releases>
   <url type="homepage">https://dolphin-emu.org</url>
   <url type="bugtracker">https://bugs.dolphin-emu.org/projects/emulator/issues</url>

Flatpak/org.DolphinEmu.dolphin-emu.yml

@@ -63,16 +63,12 @@ modules:
       - /share/man
     post-install:
       - install -D -t ${FLATPAK_DEST}/bin/ ../dolphin-emu-wrapper
-      - "${FLATPAK_BUILDER_BUILDDIR}/Flatpak/fill_release_node.sh"
-      - install -Dm644 -t ${FLATPAK_DEST}/share/metainfo/ ../org.DolphinEmu.dolphin-emu.metainfo.xml
+      - install -Dm644 -t ${FLATPAK_DEST}/share/metainfo/ Flatpak/org.DolphinEmu.dolphin-emu.metainfo.xml
       - desktop-file-edit --set-key=Exec --set-value='/app/bin/dolphin-emu-wrapper'
         /app/share/applications/dolphin-emu.desktop
     sources:
       - type: dir
         path: ..
-      - type: file
-        path: org.DolphinEmu.dolphin-emu.metainfo.xml.in
-        dest-filename: org.DolphinEmu.dolphin-emu.metainfo.xml
       - type: script
         commands:
           - |