media-libs/imgui: 1.81: fix ebuild

wrapdb's meson.build file needs some tweaks so the library gets
properly installed.

Signed-off-by: Adel KARA SLIMANE <adel.ks@zegrapher.com>

media-libs/imgui/files/imgui-1.81-wrapdb-meson-fix.patch

@@ -0,0 +1,45 @@
+# Meson wrapdb's meson.build file doesn't handle installing the library, we patch that here
+
+diff --git a/meson.build b/imgui-1.81-meson.build
+index 3343dd4ad..804f84227 100644
+--- a/meson.build
++++ b/imgui-1.81-meson.build
+@@ -80,6 +80,38 @@ imgui = library('imgui',
+     sources,
+     dependencies: dependencies,
+     include_directories: include_dirs,
++    version: meson.project_version(),
++    install: true
+ )
+
++pkg_mod = import('pkgconfig')
++pkg_mod.generate(imgui,
++  description : 'Dear ImGui: Bloat-free Graphical User interface for C++ with minimal dependencies'
++)
++
++install_headers(
++    'imconfig.h',
++    'imgui.h',
++    'imgui_internal.h',
++    'imstb_rectpack.h',
++    'imstb_textedit.h',
++    'imstb_truetype.h',
++    'backends/imgui_impl_dx9.h',
++    'backends/imgui_impl_osx.h',
++    'backends/imgui_impl_sdl.h',
++    'backends/imgui_impl_dx10.h',
++    'backends/imgui_impl_dx11.h',
++    'backends/imgui_impl_dx12.h',
++    'backends/imgui_impl_glfw.h',
++    'backends/imgui_impl_glut.h',
++    'backends/imgui_impl_wgpu.h',
++    'backends/imgui_impl_metal.h',
++    'backends/imgui_impl_win32.h',
++    'backends/imgui_impl_vulkan.h',
++    'backends/imgui_impl_opengl2.h',
++    'backends/imgui_impl_opengl3.h',
++    'backends/imgui_impl_allegro5.h',
++    'backends/imgui_impl_marmalade.h',
++    subdir: 'imgui')
++
+ imgui_dep = declare_dependency(include_directories: include_dirs, link_with: imgui)

media-libs/imgui/imgui-1.81.ebuild

@@ -40,6 +40,10 @@ BDEPEND="
 	app-arch/unzip
 "
 
+PATCHES=(
+	"${FILESDIR}/imgui-1.81-wrapdb-meson-fix.patch"
+)
+
 src_unpack() {
 	default