Bugfix: Dont overwrite running hooks.

[gabyx]

Some small bugfix. Thx for merging.

This will work for sure on UNIX.

# Try to delete this hook first, because it could be currently running.
# The file stays around till the last file descriptor is freed.
rm -f "$TARGET_HOOK" >/dev/null 2>&1

On Windows it might not (cannot delete open files...) resulting in the same behavior which did not make problems so far on windows.

[coveralls]

Pull Request Test Coverage Report for Build 420

• 3 of 3 (100.0%) changed or added relevant lines in 2 files are covered.
• No unchanged relevant lines lost coverage.
• Overall coverage increased (+0.007%) to 87.095%

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Totals
Change from base Build 415:	0.007%
Covered Lines:	1721
Relevant Lines:	1976

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💛 - Coveralls

[gabyx]

Thx, wrong stuff in the commit, now it should be mergebale. Sorry for my eagerness!

[rycus86]

That's OK, thanks for the quick fix! :)