CDRIVER-5866 use quoted includes (#1836)

Author: jeroen

src/libmongoc/src/mongoc/mongoc-init.c

@@ -52,7 +52,7 @@
 
 #ifdef MONGOC_ENABLE_SASL_CYRUS
 #include <sasl/sasl.h>
-#include <mongoc-cyrus-private.h> // _mongoc_cyrus_verifyfile_cb
+#include "mongoc-cyrus-private.h" // _mongoc_cyrus_verifyfile_cb
 
 static void *
 mongoc_cyrus_mutex_alloc (void)

src/libmongoc/src/mongoc/utlist.h

@@ -17,7 +17,7 @@
 #ifndef MONGOC_UTLIST_H
 #define MONGOC_UTLIST_H
 
-#include <mongoc-prelude.h>
+#include "mongoc-prelude.h"
 
 #include <uthash-2.3.0/utlist.h>