Update lua54 to rev 2 via SR 821867
https://build.opensuse.org/request/show/821867
by user gmbr3 + dimstar_suse
- Add upstream patches 7 & 8
- Add upstream-bugs.patch, upstream fixes from https://www.lua.org/bugs.html
- files_test.patch: use proper check for 64-bit time_t
- Amend list of 64bit architectures