File include.patch of Package libliftoff

diff --git a/meson.build b/meson.build
index 8d1c73e..6210523 100644
--- a/meson.build
+++ b/meson.build
@@ -50,6 +50,7 @@ liftoff = declare_dependency(
 pkgconfig = import('pkgconfig')
 pkgconfig.generate(
 	libraries: liftoff_lib,
+	subdirs: 'liftoff',
 	version: meson.project_version(),
 	filebase: meson.project_name(),
 	name: meson.project_name(),