Add .git suffix to URL because only GitHub itself works without it. (#2319)

xkszltl · web-flow · commit 134a2ec3f7af · 2020-07-23T13:21:09.000-04:00
Fix #2318
diff --git a/.gitmodules b/.gitmodules
@@ -1,3 +1,3 @@
 [submodule "tools/clang"]
 	path = tools/clang
-	url = ../../wjakob/clang-cindex-python3
+	url = ../../wjakob/clang-cindex-python3.git
