Update dependencies

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

@@ -1,4 +1,3 @@
-#ifndef USE_EXTERNAL_ZSTD
 /*
  * divsufsort.h for libdivsufsort-lite
  * Copyright (c) 2003-2008 Yuta Mori All Rights Reserved.
@@ -28,6 +27,11 @@
 #ifndef _DIVSUFSORT_H
 #define _DIVSUFSORT_H 1
 
+#ifdef __cplusplus
+extern "C" {
+#endif /* __cplusplus */
+
+
 /*- Prototypes -*/
 
 /**
@@ -55,6 +59,9 @@ divsufsort(const unsigned char *T, int *SA, int n, int openMP);
 int
 divbwt(const unsigned char *T, unsigned char *U, int *A, int n, unsigned char * num_indexes, int * indexes, int openMP);
 
-#endif /* _DIVSUFSORT_H */
 
-#endif /* USE_EXTERNAL_ZSTD */
+#ifdef __cplusplus
+} /* extern "C" */
+#endif /* __cplusplus */
+
+#endif /* _DIVSUFSORT_H */