Kick off post 1.7.11 cycle

I haven't decided what to call this one, 1.7.12, 1.8.0, or even 2.0.
Given that summer is a relatively slow season, I suspect 1.7.12 is
the most likely outcome, but we will see.

Signed-off-by: Junio C Hamano <gitster@pobox.com>

GIT-VERSION-GEN

@@ -1,7 +1,7 @@
 #!/bin/sh
 
 GVF=GIT-VERSION-FILE
-DEF_VER=v1.7.11
+DEF_VER=v1.7.11.GIT
 
 LF='
 '