Added git as a submodule

This commit adds the subdirectory 'git' as a submodule containing
the git git repository, but doesn't add support for automatically
cloning the submodule.

Signed-off-by: Lars Hjemli <hjemli@gmail.com>

Makefile

@@ -1,7 +1,7 @@
 CGIT_VERSION = 0.2
 
 prefix = /var/www/htdocs/cgit
-gitsrc = ../git
+gitsrc = git
 
 SHA1_HEADER = <openssl/sha.h>
 

git

@@ -0,0 +1 @@
+Subproject commit 9159afbfce955db86373dab95b5f8e31fb763dae