NEWS: Rename "Changes since GDB 7.6" into "Changes in GDB 7.7"

gdb/ChangeLog:

        * NEWS: Change "Changes since GDB 7.6" to "Changes in GDB 7.7".
diff --git a/gdb/ChangeLog b/gdb/ChangeLog
index 5958769..c6e38d6 100644
--- a/gdb/ChangeLog
+++ b/gdb/ChangeLog
@@ -1,3 +1,7 @@
+2014-02-06  Joel Brobecker  <brobecker@adacore.com>
+
+	* NEWS: Change "Changes since GDB 7.6" to "Changes in GDB 7.7".
+
 2014-02-05  Yao Qi  <yao@codesourcery.com>
 
 	* ctf.c: Include "inferior.h" and "gdbthread.h".
diff --git a/gdb/NEWS b/gdb/NEWS
index d408f90..2c0b179 100644
--- a/gdb/NEWS
+++ b/gdb/NEWS
@@ -1,7 +1,7 @@
 		What has changed in GDB?
 	     (Organized release by release)
 
-*** Changes since GDB 7.6
+*** Changes in GDB 7.7
 
 * GDB now supports SystemTap SDT probes on AArch64 GNU/Linux.