Use git-1.5.3 as submodule

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

diff --git a/git b/git
index aba170cdb4874b72dd619e6f7bbc13c33295f831..86bab9615c3516d4ac7756ae3c1285d331b78f04 160000 (submodule)
--- a/git
+++ b/git
@@ -1 +1 @@
-Subproject commit aba170cdb4874b72dd619e6f7bbc13c33295f831
+Subproject commit 86bab9615c3516d4ac7756ae3c1285d331b78f04