component/luajit: Version up 69bbf3c1b01de8239444b0c430a89fa868978fea

Following advice from https://luajit.org/download.html use recent commit id,
but rely on github archive.

component/luajit/buildout.cfg

@@ -7,8 +7,8 @@ parts = luajit
 [luajit]
 recipe = slapos.recipe.cmmi
 shared = true
-url = https://luajit.org/download/LuaJIT-2.0.5.tar.gz
-md5sum = 48353202cbcacab84ee41a5a70ea0a2c
+url = https://github.com/LuaJIT/LuaJIT/archive/69bbf3c1b01de8239444b0c430a89fa868978fea.tar.gz
+md5sum = a95ff00d4f327aa68905c35814310d82
 configure-command = true
 # pass dummy LDCONFIG to skip needless calling of ldconfig by non-root user
 make-options =