LinGUI: Port to Meson build system

- Add update notes to metainfo.xml
- Clean up legacy build files
- Reorganize gtk source directory
- Add centralized set of cross files for all Meson projects

contrib/libdav1d/module.defs

@@ -30,11 +30,11 @@ else
 endif
 
 ifeq (darwin,$(HOST.system))
-        LIBDAV1D.CONFIGURE.extra += --cross-file=$(call fn.ABSOLUTE,$(LIBDAV1D.EXTRACT.dir/))/$(HOST.machine)-darwin-gcc.meson -Dc_args="-arch $(HOST.machine)"
+        LIBDAV1D.CONFIGURE.extra += --cross-file=$(call fn.ABSOLUTE,$(SRC/))make/cross/$(HOST.machine)-darwin-gcc.meson -Dc_args="-arch $(HOST.machine)"
 endif
 
 ifeq (1-mingw,$(HOST.cross)-$(HOST.system))
-    LIBDAV1D.CONFIGURE.extra += --cross-file=$(call fn.ABSOLUTE,$(LIBDAV1D.EXTRACT.dir/))$(HOST.machine)-w64-mingw32.meson
+    LIBDAV1D.CONFIGURE.extra += --cross-file=$(call fn.ABSOLUTE,$(SRC/))make/cross/$(HOST.machine)-w64-mingw32.meson
 endif
 
 LIBDAV1D.BUILD.make       = $(NINJA.exe)

contrib/libdovi/module.defs

@@ -24,7 +24,8 @@ endif
 
 LIBDOVI.manifest = --manifest-path="$(LIBDOVI.EXTRACT.dir/)dolby_vision/Cargo.toml"
 LIBDOVI.prefix   = --prefix "$(LIBDOVI.CONFIGURE.prefix)"
-LIBDOVI.extra    = --release --library-type staticlib $(LIBDOVI.prefix) $(LIBDOVI.target)
+LIBDOVI.extra    = --release --library-type staticlib $(LIBDOVI.prefix) $(LIBDOVI.target) \
+                   --pkgconfigdir "$(LIBDOVI.CONFIGURE.prefix)/lib/pkgconfig"
 
 LIBDOVI.BUILD.make       = $(CARGO.exe) cbuild
 LIBDOVI.BUILD.extra      = $(LIBDOVI.extra)