Upgrade versions of vendored libs

vendor/github.com/DataDog/zstd/divsufsort.c

@@ -1,3 +1,4 @@
+#ifndef USE_EXTERNAL_ZSTD
 /*
  * divsufsort.c for libdivsufsort-lite
  * Copyright (c) 2003-2008 Yuta Mori All Rights Reserved.
@@ -1576,7 +1577,7 @@ note:
     /* Construct the inverse suffix array of type B* suffixes using trsort. */
     trsort(ISAb, SA, m, 1);
 
-    /* Set the sorted order of tyoe B* suffixes. */
+    /* Set the sorted order of type B* suffixes. */
     for(i = n - 1, j = m, c0 = T[n - 1]; 0 <= i;) {
       for(--i, c1 = c0; (0 <= i) && ((c0 = T[i]) >= c1); --i, c1 = c0) { }
       if(0 <= i) {
@@ -1911,3 +1912,5 @@ divbwt(const unsigned char *T, unsigned char *U, int *A, int n, unsigned char *
 
   return pidx;
 }
+
+#endif /* USE_EXTERNAL_ZSTD */