modules: use our own copy of git2cl

Signed-off-by: Anas Nashif <[email protected]>

Author: nashif

.gitmodules

@@ -1,6 +1,6 @@
 [submodule "tools/git2cl"]
 	path = tools/git2cl
-	url = https://git.savannah.nongnu.org/git/git2cl.git
+	url = https://github.com/zephyrproject-rtos/git2cl.git
 [submodule "jimtcl"]
 	path = jimtcl
 	url = https://github.com/msteveb/jimtcl.git