There are the sources for SuperSU's suhide-lite mod.
At time of writing, these correspond to v1.09.
Sources for the (uninteresting) Java parts can be found in suhide/src.
Sources for the (interesting) C parts can be found in suhide/native.
The (release) build process will output files to ZIP/suhide.
The folder structure is like this because it is copied out of the larger build tree used for SuperSU builds. The script that builds the actual flashable ZIP from the ZIP/suhide folder is missing as it depends on internal tools.
The gradle build script depends on an (included) older Gradle version and handles building with the NDK manually.
Your local.properties file needs correct paths set for both sdk.dir as well as ndk.dir variables.
Builds have been tested with NDK r10e specifically, on a Windows machine.
Published with permission from CCMT