build: Drop meson wraps

- libglnx wrap is no longer needed since it became a subtree [1]
- libyaml is an optional dependency and widely available in
  distributions and we aren't actively looking for newer versions of
  it (development stopped for 5 years already but recently restarted).
  Moreover using it through a wrap raises a bunch of build warnings
  which are unfixed upstream. It is not exactly clear why it needed to
  be a wrap in [2]

[1]: #692
[2]: #382 (comment)

Author: bbhtt

.github/workflows/check.yml

@@ -99,9 +99,3 @@ jobs:
       run: |
         meson setup --wrap-mode nodownload --reconfigure ${CONFIG_OPTS} ${BUILDDIR}_dist .
         meson dist --include-subprojects -C ${BUILDDIR}_dist
-
-    - name: Configure flatpak-builder with Meson wraps
-      run: meson setup --wrap-mode=forcefallback ${CONFIG_OPTS} ${BUILDDIR}_wrap .
-
-    - name: Build flatpak-builder with Meson wraps
-      run: meson compile -C ${BUILDDIR}_wrap

src/meson.build

@@ -47,6 +47,12 @@ config_h = configure_file(
   output: 'config.h',
 )
 
+libglnx = subproject(
+  'libglnx',
+  default_options: ['tests=false'],
+)
+libglnx_dep = libglnx.get_variable('libglnx_dep')
+
 glib_req = '>= 2.66'
 flatpak_builder_deps = [
   dependency('glib-2.0', version: glib_req),
@@ -55,10 +61,10 @@ flatpak_builder_deps = [
   dependency('json-glib-1.0'),
   dependency('libcurl'),
   dependency('libelf', version: '>= 0.8.12'),
-  dependency('libglnx', default_options: ['tests=false']),
   dependency('libxml-2.0', version: '>= 2.4'),
   dependency('ostree-1', version: '>= 2017.14'),
   yaml_dep,
+  libglnx_dep,
 ]
 
 flatpak_builder = executable(