Pre push hook script
Add git_hook folder, and pre-push script,
to be soft linked from .git/hooks/pre-push
diff --git a/git_hooks/README.md b/git_hooks/README.md
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+++ b/git_hooks/README.md
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+README for git hooks script
+===========================
+git has a way to run scripts, which are invoked by specific git commands.
+The git hooks are located in `<mbed TLS root>/.git/hooks`, and as such are not under version control
+for more information, see the [git documentation](https://git-scm.com/docs/githooks).
+
+The mbed TLS git hooks are located in `<mbed TLS root>/git_hooks` directory, and one must create a soft link from `<mbed TLS root>/.git/hooks` to `<mbed TLS root>/git_hooks`, in order to make the hook scripts successfully work.
+
+Example:
+
+Execute the following command to create a link on linux from the mbed TLS `.git\hooks` directory:
+`ln -s ../../git_hooks/pre-push pre-push`
+
+Similarly, on Windows while running as administrator:
+`mklink pre-push ..\..\git_hooks\pre-push`
+