degesch: fix Lua 5.4 build

Not sure about how well it works yet.

Lua 5.3 is still made preferential by the order of pkgconfig lookup.

CMakeLists.txt

@@ -85,7 +85,7 @@ include_directories (${libffi_INCLUDE_DIRS})
 link_directories (${libffi_LIBRARY_DIRS})
 
 # FIXME: other Lua versions may be acceptable, don't know yet
-pkg_search_module (lua lua53 lua5.3 lua-5.3 lua>=5.3)
+pkg_search_module (lua lua53 lua5.3 lua-5.3 lua54 lua5.4 lua-5.4 lua>=5.3)
 option (WITH_LUA "Enable support for Lua plugins" ${lua_FOUND})
 
 if (WITH_LUA)