luajit: bump a new version

Add LUAJIT_ENABLE_PAIRSMM flag as a build option for luajit.
If the flag is set, pairs/ipairs metamethods are available in
Lua 5.1.
For Tarantool this option is enabled by default.

(cherry picked from commit 93e710d5de0d723086bda6fedc9cb383a8e5e477)