Creating nsjail RPM specification and build patch based on upstream-git branch

Creating nsjail RPM specification and build patch based on upstream-git branch

Upstream git was created with "nsjail 2021-07-07 version"
For Tizen RPM, additional patches were created based on the open source version

1) Linking to upstream-git branch - .gbs.conf
   : You can check the Tizen open source updating guide at https://wiki.tizen.org/Updating_packages

2) Creating kafel.tar.gz
   : Unfortunately, Tizen does not provide git tool at build time. (git-core package is required)
   : Thus, instead of using git submodule command, create kafel.tar.gz from the git submodule.
   : For your information, following patch is added for the kafel for fixing build error (TODO)

	+// Fix for Linux <3.12
	+#ifndef EM_ARM
	+#define EM_ARM 40
	+#endif
	+

3) NSJail requires 3.2.24 over libnl3 vesion.
   Unfortunately, current Tizen libnl3 version 3.2.22. (TODO)