DONOTMERGE: temporarily pointing to my fork to check the libgit2 changes

Author: tiennou

.gitmodules

@@ -1,6 +1,6 @@
 [submodule "libgit2"]
 	path = External/libgit2
-	url = https://github.com/libgit2/libgit2.git
+	url = https://github.com/tiennou/libgit2.git
 [submodule "openssl"]
 	path = External/openssl
 	url = https://github.com/openssl/openssl.git