port lua 5.2 to xboot
fix some warnning
fix warnning
new stdio c library
.cproject
fix vsnprintf.c warnning
fix stdio
porting stdio library -- musl
fix stdio
fix strerror.c
fix stdio
fix stdio
fix runtime
Merge branch 'lua5.2' into stdio
fix lua5.2
change lua's directory
change strerror function's head file to errno.h
add comment for ctype functions
add comment for errno some functions
add comment for string functions