doc: update git version documented in HACKING

* HACKING: Mention that git version 1.6.4 or later is required since
'./bootstrap' will fail otherwise.

diff --git a/HACKING b/HACKING
index 0c8205fb0403a2610e5cc3b69e9b3bbd56965022..f07903844a14024af144f379323e63d126b3630c 100644 (file)
--- a/HACKING
+++ b/HACKING
@@ -6,7 +6,7 @@ Prerequisites
 You will need the "git" version control tools.  On Fedora-based
 systems, do "yum install git".  On Debian-based ones install the
 "git-core" package.  Then run "git --version".  If that says it's
-older than version 1.4.4, then you'd do well to get a newer version.
+older than version 1.6.4, then you'd do well to get a newer version.
 At worst, just download the latest stable release from
 https://git-scm.com/ and build from source.