Changes.txt in autobuild-1.5.10 vs Changes.txt in autobuild-1.5.11

@@ -1,4 +1,8 @@
+== Version 1.5.11
+* don't sleep unnecessarily on filesystems that have sub-second modification
+  time resolutions. This speeds up builds.
+
 == Version 1.5.10
 * avoid unnecessary reconfigurations in the autotools handler
 
 == Version 1.5.9
 * small fixes