From: Fabian Vogt <fabian@ritter-vogt.de>
Subject: Find LMDB without pkg-config or CMake

Upstream LMDB provides neither.

Index: AppStream-0.12.7/meson.build
===================================================================
--- AppStream-0.12.7.orig/meson.build
+++ AppStream-0.12.7/meson.build
@@ -66,7 +66,7 @@ gio_dep = dependency('gio-2.0', version
 gio_unix_dep = dependency('gio-unix-2.0', version : '>=2.54')
 xml2_dep = dependency('libxml-2.0')
 yaml_dep = dependency('yaml-0.1')
-lmdb_dep = dependency('lmdb')
+lmdb_dep = meson.get_compiler('c').find_library('lmdb')
 
 if get_option ('gir')
     # ensure we have a version of GIR that isn't broken with Meson