fix arm __tlsdesc_dynamic when built as thumb code without __ARM_ARCH>=5

[musl] / src / thread / pthread_kill.c

#include "pthread_impl.h"
#include "lock.h"

int pthread_kill(pthread_t t, int sig)
{
        int r;
        LOCK(t->killlock);
        r = t->tid ? -__syscall(SYS_tkill, t->tid, sig)
                : (sig+0U >= _NSIG ? EINVAL : 0);
        UNLOCK(t->killlock);
        return r;
}