pre-commit auto remove trailing whitespace from `.mk` files (#377)

If there are too many changes / files I can create a smaller PR

Thanks

Port main/sccomp to gbuild.
Fix the include paths for CoinMP.
Add CoinMP to RepositoryExternal.mk.

Patch by: me


git-svn-id: https://svn.apache.org/repos/asf/openoffice/trunk@1777528 13f79535-47bb-

Port main/sccomp to gbuild.
Fix the include paths for CoinMP.
Add CoinMP to RepositoryExternal.mk.

Patch by: me


git-svn-id: https://svn.apache.org/repos/asf/openoffice/trunk@1777528 13f79535-47bb-0310-9956-ffa450edef68

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