lua: Avoid to touch in CFLAGS/LDFLAGS.
lua: Avoid to touch in CFLAGS/LDFLAGS.

Avoid to touch in CFLAGS/LDFLAGS (using now MYCFLAGS and MYLDFLAGS)
in order to avoid to build lua without readline history support.

Reported by Aurelio Jargas (verde).

Signed-off-by: Rudá Moura <3ceaf19413469ca7df9f6a96603874755ef36481@gmail.com>

rudix-mac/rudix,FelixZhang00/rudix,FelixZhang00/rudix,rudix-mac/rudix,FelixZhang00/rudix,rudix-mac/rudix,FelixZhang00/rudix