[sanitizer] Fix the internal_clone implementation on loongarch

[tangyouling]

Summary

Fix syscall clone argument passing order, also call fn(arg) should
return, change jr $a5(jirl $zero, $a5, 0) to jirl $ra, $a5, 0.

[tangyouling]

See the definition of __clone in glibc for details,
Link: https://elixir.bootlin.com/glibc/glibc-2.36/source/sysdeps/unix/sysv/linux/loongarch/clone.S#L33

compiler-rt/lib/sanitizer_common/sanitizer_linux.cpp

if (!fn || !child_stack)
     return -EINVAL;
 
   CHECK_EQ(0, (uptr)child_stack % 16);
 
   register int res __asm__("$a0");
   register int __flags __asm__("$a0") = flags;
   register void *__stack __asm__("$a1") = child_stack;
   register int *__ptid __asm__("$a2") = parent_tidptr;
-  register void *__tls __asm__("$a3") = newtls;
-  register int *__ctid __asm__("$a4") = child_tidptr;
+  register int *__ctid __asm__("$a3") = child_tidptr;
+  register void *__tls __asm__("$a4") = newtls;
   register int (*__fn)(void *) __asm__("$a5") = fn;
   register void *__arg __asm__("$a6") = arg;
   register int nr_clone __asm__("$a7") = __NR_clone;
 
   __asm__ __volatile__(
       "syscall 0\n"
 
       // if ($a0 != 0)
       //   return $a0;
       "bnez $a0, 1f\n"
 
       // In the child, now. Call "fn(arg)".
       "move $a0, $a6\n"
-      "jr $a5\n"
+      "jirl $ra, $a5, 0\n"
 
       // Call _exit($a0).
       "addi.d $a7, $zero, %9\n"
       "syscall 0\n"
+
       "1:\n"
 
       : "=r"(res)
-      : "0"(__flags), "r"(__stack), "r"(__ptid), "r"(__tls), "r"(__ctid),
+      : "0"(__flags), "r"(__stack), "r"(__ptid), "r"(__ctid), "r"(__tls),
         "r"(__fn), "r"(__arg), "r"(nr_clone), "i"(__NR_exit)
       : "memory", "$t0", "$t1", "$t2", "$t3", "$t4", "$t5", "$t6", "$t7", "$t8");
   return res;
 }
 #elif defined(__powerpc64__)
 uptr internal_clone(int (*fn)(void *), void *child_stack, int flags, void *arg,
                    int *parent_tidptr, void *newtls, int *child_tidptr) {
   long long res;