[PATCH] NEWS: mention the change in default build flags

[David Bremner]

It blows things up by a factor of six or so, so it's worth giving
people a heads up. It won't effect e.g. Debian, that already builds
with -g and then strips.
---
 NEWS | 7 +++++++
 1 file changed, 7 insertions(+)

diff --git a/NEWS b/NEWS
index fa57e5d..eb769fd 100644
--- a/NEWS
+++ b/NEWS
@@ -42,6 +42,13 @@ Python Bindings
 
 Add support for `notmuch_query_add_tag_exclude`
 
+Build System
+------------
+
+The notmuch binaries and libraries are now build with debugging symbols
+by default.  Users concerned with disk space should change the
+defaults when configuring or use the strip(1) command.
+
 Notmuch 0.18.1 (2014-06-25)
 ===========================
 
-- 
2.1.0