Add JNI submodule.
diff --git a/.gitmodules b/.gitmodules
new file mode 100644
index 0000000..cf17dfc
--- /dev/null
+++ b/.gitmodules
@@ -0,0 +1,3 @@
+[submodule "jni"]
+	path = jni
+	url = ../mupdf-android-fitz.git
diff --git a/jni b/jni
new file mode 160000
index 0000000..e9e4982
--- /dev/null
+++ b/jni
@@ -0,0 +1 @@
+Subproject commit e9e49827f34b8878793923343d545d2faf39bb7e