wayvnc: Add the missing dependency on librt

See #90452. For some reason the build was working initially but stated
failing after some other changes. The problem is a missing dependency to
link with librt for shm_open and shm_unlink [0].

Fix #90452.

[0]: https://www.man7.org/linux/man-pages/man3/shm_open.3.html

pkgs/applications/networking/remote/wayvnc/add-missing-librt.patch

@@ -0,0 +1,20 @@
+diff --git a/meson.build b/meson.build
+index cc6fa03..7c2b280 100644
+--- a/meson.build
++++ b/meson.build
+@@ -24,6 +24,7 @@ add_project_arguments(c_args, language: 'c')
+ cc = meson.get_compiler('c')
+ 
+ libm = cc.find_library('m', required: false)
++librt = cc.find_library('rt', required: false)
+ 
+ pixman = dependency('pixman-1')
+ libuv = dependency('libuv')
+@@ -65,6 +66,7 @@ sources = [
+ 
+ dependencies = [
+ 	libm,
++	librt,
+ 	pixman,
+ 	libuv,
+ 	egl,

pkgs/applications/networking/remote/wayvnc/default.nix

@@ -13,6 +13,8 @@ stdenv.mkDerivation rec {
     sha256 = "0aa12fkbwhzs0g2pqw1b27l33nn5dpbcvsf1z8h88kwsf9xdvb2r";
   };
 
+  patches = [ ./add-missing-librt.patch ];
+
   postPatch = ''
     substituteInPlace meson.build \
       --replace "version: '0.1.0'" "version: '${version}'"