git: update to v2.8.3

Update to git version v2.8.3, no changes required.

Signed-off-by: Christian Hesse <mail@eworm.de>
diff --git a/Makefile b/Makefile
index a7aa08b..23f5bc1 100644
--- a/Makefile
+++ b/Makefile
@@ -14,7 +14,7 @@
 pdfdir = $(docdir)
 mandir = $(prefix)/share/man
 SHA1_HEADER = <openssl/sha.h>
-GIT_VER = 2.8.2
+GIT_VER = 2.8.3
 GIT_URL = https://www.kernel.org/pub/software/scm/git/git-$(GIT_VER).tar.gz
 INSTALL = install
 COPYTREE = cp -r