[gegl] configure: let luajit satisfy the lua dependency

[Øyvind Kolås <ok src gnome org>]

commit acc608b7732f0edf92679dd05746da14d4ca6daa
Author: Øyvind Kolås <pippin gimp org>
Date:   Fri Mar 25 11:03:13 2016 +0100

    configure: let luajit satisfy the lua dependency

 configure.ac |    3 ++-
 1 files changed, 2 insertions(+), 1 deletions(-)
---
diff --git a/configure.ac b/configure.ac
index a9bcf81..f925644 100644
--- a/configure.ac
+++ b/configure.ac
@@ -1007,7 +1007,8 @@ PKG_CHECK_MODULES(LUA, lua >= lua_required_version,
   have_lua="yes",
   [PKG_CHECK_MODULES(LUA, lua5.1 >= lua_required_version,
      have_lua="yes",
-     have_lua="no  (usable lua not found)")])
+     [PKG_CHECK_MODULES(LUA, luajit >= 2.0.4,
+     have_lua="no  (usable lua not found)")])])
 fi
 
 AM_CONDITIONAL(HAVE_LUA, test "$have_lua" = "yes")