rework langinfo code for ABI compat and for use by time code

[musl] / src / internal / ksigaction.h

/* This is the structure used for the rt_sigaction syscall on most archs,
 * but it can be overridden by a file with the same name in the top-level
 * arch dir for a given arch, if necessary. */
struct k_sigaction {
        void (*handler)(int);
        unsigned long flags;
        void (*restorer)(void);
        unsigned mask[2];
};