Nix: move patches to subdir

nix/meson-build.patch

@@ -1,64 +0,0 @@
-diff --git a/meson.build b/meson.build
-index f3802553..6a924a79 100644
---- a/meson.build
-+++ b/meson.build
-@@ -21,9 +21,9 @@ else
- endif
- 
- GIT_BRANCH = run_command('git', 'rev-parse', '--abbrev-ref', 'HEAD', check: false).stdout().strip()
--GIT_COMMIT_HASH = run_command('git', 'rev-parse', 'HEAD', check: false).stdout().strip()
-+GIT_COMMIT_HASH = '@GIT_COMMIT_HASH@'
- GIT_COMMIT_MESSAGE = run_command('sh', '-c', 'git show | head -n 5 | tail -n 1', check: false).stdout().strip()
--GIT_DIRTY = run_command('sh', '-c', 'git diff-index --quiet HEAD -- || echo "dirty"', check: false).stdout().strip()
-+GIT_DIRTY = '@GIT_DIRTY@'
- 
- add_project_arguments(
-   [
-@@ -39,21 +39,8 @@ add_project_arguments(
-   ],
-   language: 'cpp')
- 
--wlroots = subproject('wlroots', default_options: ['examples=false'])
--have_xwlr = wlroots.get_variable('features').get('xwayland')
--xcb_dep = dependency('xcb', required: get_option('xwayland'))
--
--cmake = import('cmake')
--udis = cmake.subproject('udis86')
--udis86 = udis.dependency('libudis86')
--
--if get_option('xwayland').enabled() and not have_xwlr
--	error('Cannot enable Xwayland in Hyprland: wlroots has been built without Xwayland support')
--endif
--have_xwayland = xcb_dep.found() and have_xwlr
--
--if not have_xwayland
--  add_project_arguments('-DNO_XWAYLAND', language: 'cpp')
-+if get_option('xwayland').disabled()
-+  add_project_arguments('-DNO_XWAYLAND', language: 'cpp')
- endif
- 
- backtrace_dep = cpp_compiler.find_library('execinfo', required: false)
-diff --git a/src/meson.build b/src/meson.build
-index 7b658d31..60aa4057 100644
---- a/src/meson.build
-+++ b/src/meson.build
-@@ -7,16 +7,16 @@ executable('Hyprland', src,
-     server_protos,
-     dependency('wayland-server'),
-     dependency('wayland-client'),
--    wlroots.get_variable('wlroots'),
-+    dependency('wlroots'),
-     dependency('cairo'),
-     dependency('libdrm'),
-     dependency('egl'),
-     dependency('xkbcommon'),
-     dependency('libinput'),
--    xcb_dep,
-+    dependency('xcb', required: get_option('xwayland')),
-     backtrace_dep,
-     systemd_dep,
--    udis86,
-+    dependency('udis86'),
- 
-     dependency('pixman-1'),
-     dependency('gl', 'opengl'),