[Courgette Experimental] Replace QSufSort with libdivsufsort

courgette/third_party/bsdiff/bsdiff_search.h

Index: courgette/third_party/bsdiff/bsdiff_search.h
diff --git a/courgette/third_party/bsdiff/bsdiff_search.h b/courgette/third_party/bsdiff/bsdiff_search.h
index e4dd1e7e5f224ad65a7e3a071af53bb8a61e345c..47123efe6cf91ff68a345bf44f7c0c0c3596f36c 100644
--- a/courgette/third_party/bsdiff/bsdiff_search.h
+++ b/courgette/third_party/bsdiff/bsdiff_search.h
@@ -47,7 +47,7 @@
 #include <algorithm>
 #include <cstring>
 
-namespace courgette {
+namespace bsdiff {
 
 // Similar to ::memcmp(), but returns match length instead.
 inline int matchlen(const unsigned char* old,
@@ -96,6 +96,6 @@ int search(T I,
   return y;
 }
 
-}  // namespace courgette
+}  // namespace bsdiff
 
 #endif  // COURGETTE_THIRD_PARTY_BSDIFF_BSDIFF_SEARCH_H_