Script to build OpenNSA kernel modules

Summary:
OpenNSA has prebuilt SDK but kernel modules have to be built from sources. Add
a utility script to build and extend packaging script.

In future, we can consider folding this build into fbcode_builder itself.

Differential Revision: D20549883

fbshipit-source-id: f9475b7e0223e9f357117d7d7d27df8904fa1d73

build/fbcode_builder/manifests/OpenNSA

@@ -14,3 +14,4 @@ lib/x86-64 = lib
 include = include
 src/gpl-modules/systems/bde/linux/include = include/systems/bde/linux
 src/gpl-modules/include/ibde.h = include/ibde.h
+src/gpl-modules = src/gpl-modules