streaming_write_entry(): support files with holes

diff --git a/RelNotes b/RelNotes
index 540b756d2f64d8c8ebf927a707b9b2cc0a4c6151..5fcc4ef74770e8587a1469fff5e3f5610dabf0e1 120000 (symlink)
--- a/RelNotes
+++ b/RelNotes
@@ -1 +1 @@
-Documentation/RelNotes/1.7.5.txt
\ No newline at end of file
+Documentation/RelNotes/1.7.6.txt
\ No newline at end of file