Don't run git during the build

--- Makefile.orig	2016-11-20 12:29:46 UTC
+++ Makefile
@@ -9,7 +9,7 @@ _ver2	= $(shell git rev-parse --verify -
 # hand-made
 _ver3	= v2.8.0-rc0
 
-VERSION	= $(or $(_ver0),$(_ver1),$(_ver2),$(_ver3))
+VERSION	= $(_ver3)
 
 all: main plugins man