CI/Flatpak: Switch from JSON -> YAML

Actually lets me have comments...

scripts/flatpak/modules/22-shaderc.yaml

@@ -0,0 +1,21 @@
+name: shaderc
+buildsystem: cmake-ninja
+builddir: true
+config-opts:
+  - "-DCMAKE_BUILD_TYPE=Release"
+  - "-DSHADERC_SKIP_TESTS=ON"
+  - "-DSHADERC_SKIP_EXAMPLES=ON"
+  - "-DSHADERC_SKIP_COPYRIGHT_CHECK=ON"
+build-options:
+  strip: true
+sources:
+  - type: git
+    url: "https://github.com/stenzek/shaderc.git"
+    commit: "feb2460bf3a504d67011246edeb810c45ea58826"
+cleanup:
+  - /bin
+  - /include
+  - /lib/*.a
+  - /lib/*.la
+  - /lib/cmake
+  - /lib/pkgconfig